A dry quenching system

Abstract

The embodiment of the present application provides a dry quenching system, which comprises a dry quenching furnace, a boiler, a first gas outlet pipeline, a second gas outlet pipeline, two first-stage power dust collectors, a first gas inlet pipeline, a circulating fan and a heat pipe heat exchanger; the first gas outlet pipeline is connected with the dry quenching furnace and the boiler, and the second gas outlet pipeline is connected with the dry quenching furnace and the boiler; the two first-stage power dust collectors are arranged on the first gas outlet pipeline and the second gas outlet pipeline respectively, and the two first-stage power dust collectors are located on the two sides of the boiler or the dry quenching furnace; the first gas inlet pipeline is connected with the boiler and the dry quenching furnace; the circulating fan is arranged on the first gas inlet pipeline; the heat pipe heat exchanger is arranged on the first gas inlet pipeline, and the heat pipe heat exchanger is located on the side of the circulating fan close to the dry quenching furnace; and the circulating fan or the heat pipe heat exchanger is arranged below the boiler. The dry quenching system provided by the present application can improve the dust removal efficiency of the dry quenching system and reduce the floor area of the dry quenching equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dry quenching, in particular to a dry quenching system. BACKGROUND

[0002] Efficiently recycling the heat (coke sensible heat) generated in the coke production process is the main direction of future energy saving and emission reduction.

[0003] The dry quenching system is used to form a circulating loop between the dry quenching furnace and the boiler, so as to recycle the heat generated in the coke production process. The dry quenching system includes a dry quenching furnace, a dry quenching boiler, a dust collector, a circulating fan and a heat pipe heat exchanger, and a gas pipeline connecting each device. In order to reduce the content of coke powder and other impurities in the circulating gas in the dry quenching system, a dust collector is generally arranged between the dry quenching furnace and the boiler to reduce the content of coke powder and other impurities in the circulating gas flowing out of the dry quenching furnace, thereby reducing the wear of the boiler caused by coke powder and other impurities. However, the dust collector in the related art is a gravity type dust collector, which is a dust separation device that separates dust by its own gravity. The dust removal efficiency is low, and the gravity type dust collector is arranged in line with the dry quenching furnace and the boiler, so that the land occupation area of the dry quenching system is large. SUMMARY

[0004] The purpose of the embodiment of the present application is to provide a dry quenching system to improve the dust removal efficiency of the dry quenching system and reduce the land occupation area of the dry quenching device. The specific technical solution is as follows:

[0005] The embodiment of the first aspect of the present application provides a dry quenching system, which comprises a dry quenching furnace, a boiler, a first gas outlet pipeline, a second gas outlet pipeline, two first-stage dynamic dust collectors, a first gas inlet pipeline, a circulating fan and a heat pipe heat exchanger. The first gas outlet pipeline communicates the dry quenching furnace and the boiler, and the second gas outlet pipeline communicates the dry quenching furnace and the boiler. The two first-stage dynamic dust collectors are arranged on the first gas outlet pipeline and the second gas outlet pipeline respectively, and the two first-stage dynamic dust collectors are located on both sides of the dry quenching furnace or the boiler. The first gas inlet pipeline communicates the dry quenching furnace and the boiler. The circulating fan is arranged on the first gas inlet pipeline. The heat pipe heat exchanger is arranged on the first gas inlet pipeline, and the heat pipe heat exchanger is located on the side of the circulating fan close to the dry quenching furnace. The circulating fan or the heat pipe heat exchanger is arranged below the boiler.

[0006] In some embodiments, the dry quenching furnace is provided with a first gas outlet, a second gas outlet and a first gas inlet, the first gas outlet and the second gas outlet are arranged on two sides of the dry quenching furnace; the boiler is provided with a second gas inlet and a third gas outlet; the first gas outlet and the second gas inlet are connected by a first gas pipeline; the second gas outlet and the second gas inlet are connected by a second gas pipeline; the third gas outlet and the first gas inlet are connected by a first gas inlet pipeline.

[0007] In some embodiments, the boiler is provided with two second gas inlets arranged on two sides of the boiler, the first gas outlet is connected to one of the second gas inlets through the first gas pipeline, and the second gas outlet is connected to the other second gas inlet through the second gas pipeline.

[0008] In some embodiments, the boiler is further provided with a fourth gas outlet, the third gas outlet and the fourth gas outlet are arranged on two sides of the boiler; the first gas inlet pipeline comprises a first pipe section, a second pipe section and a third pipe section, the third gas outlet is connected to the air inlet side of the circulating fan through the first pipe section, the fourth gas outlet is connected to the air inlet side of the circulating fan through the second pipe section, and the air outlet side of the circulating fan is connected to the first gas inlet of the dry quenching furnace through the third pipe section.

[0009] In some embodiments, the dry quenching system further comprises a secondary power dust collector arranged on the first pipe section and / or the second pipe section.

[0010] In some embodiments, the primary power dust collector is a cyclone dust collector.

[0011] In some embodiments, the secondary power dust collector is a cyclone dust collector.

[0012] Embodiments of the second aspect of the application provide a dry quenching device comprising the dry quenching system of any of the above.

[0013] The beneficial effects of the embodiments of the application are as follows:

[0014] The circulating gas in the dry quenching furnace absorbs the sensible heat of the red coke in the dry quenching furnace and is heated, the heated circulating gas flows into the first gas outlet pipeline and the second gas outlet pipeline, is filtered by the primary power dust collector on the first gas outlet pipeline and the second gas outlet pipeline, and then enters the boiler, and exchanges heat with the feed water in the boiler, so that the circulating gas is cooled, and the cooled circulating gas reenters the dry quenching furnace through the first gas inlet pipeline, so that the heat generated in the red coke coking process in the dry quenching furnace is recycled. In the application, the primary power dust collector is arranged on the first gas outlet pipeline and the second gas outlet pipeline, the primary power dust collector has good dust removal performance, can greatly reduce the content of impurities such as coke powder in the circulating gas, and the two primary power dust collectors arranged on both sides of the boiler are used to remove dust from the circulating gas entering the boiler, which can further reduce the content of impurities such as coke powder in the circulating gas and improve the dust removal efficiency of the dry quenching system. In addition, the installation position of the primary power dust collector is flexible, and the primary power dust collector does not need to be arranged in line with the boiler and the dry quenching furnace, so that the position of the boiler can be raised, and the circulating fan or the heat pipe heat exchanger can be arranged below the boiler. The space below the boiler can be fully utilized in the arrangement of the dry quenching equipment, the space utilization rate of the dry quenching equipment in the height direction is increased, the arrangement of various devices in the dry quenching equipment is compact, and the floor area of the dry quenching equipment is reduced.

[0015] Of course, implementing any product or method of the present application does not necessarily require achieving all the advantages described above at the same time. The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed in the embodiment or related art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other embodiments according to these drawings without creating any creative labor.

[0017] Figure 1 It is a structural schematic diagram of a dry quenching system in the related art;

[0018] Figure 2 It is a plane structural schematic diagram of a dry quenching system in some embodiments of the present application;

[0019] Figure 3 It is Figure 2A simplified planar structural diagram of a dry quenching system;

[0020] Figure 4 This is a three-dimensional structural diagram of a dry quenching system according to some embodiments of this application;

[0021] Figure 5 This is a schematic diagram of another planar structure of a dry quenching system according to some embodiments of this application;

[0022] Figure 6 for Figure 5 A simplified planar structural diagram of a dry quenching system in China;

[0023] Figure 7 This is a schematic diagram of another planar structure of a dry quenching system according to some embodiments of this application;

[0024] Figure 8 for Figure 7 A simplified planar structural diagram of a dry quenching system in China;

[0025] Figure label:

[0026] Among the related technologies: dry quenching furnace 10, primary dust collector 20, boiler 30, secondary dust collector 40, circulating fan 50, heat pipe heat exchanger 60;

[0027] In this application: 1. Dry quenching furnace; 2. Primary power dust collector; 3. Boiler; 4. Secondary power dust collector; 5. Circulating fan; 6. Heat pipe heat exchanger; 7. Elevator; 101 first air outlet; 102 second air outlet; 103 first air inlet; 301 second air inlet; 302 third air outlet; 303 fourth air outlet; 501 air inlet side; 502 air outlet side; 100 first air outlet pipe; 200 second air outlet pipe; 300 first air inlet pipe; 310 first pipe section; 320 second pipe section; 330 third pipe section. Detailed Implementation

[0028] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0030] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly specified and limited.

[0031] Reference herein to "embodiments" means that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily a separate or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0033] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0034] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0035] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0036] Dry quenching refers to a quenching method for cooling red coke by using inert gas. In the dry quenching process, the circulating gas absorbs the sensible heat of the red coke in the dry quenching furnace, enters the boiler to exchange heat with the boiler feed water, and recovers heat. The cooled circulating gas is re-introduced into the dry quenching furnace by the circulating fan, so that the circulating gas is circulated in the closed dry quenching system. As shown in Figure 1 The dry quenching equipment in the related art includes a dry quenching furnace 10, a primary dust collector 20, a boiler 30, a secondary dust collector 40, a circulating fan 50, and a heat pipe heat exchanger 60, and the different devices are connected by a plurality of gas pipelines. In the related art, the primary dust collector 20 is generally a gravity dust collector. Since the gravity dust collector is a dust collection device that separates dust by gravity, the dust collection efficiency is low. Moreover, the gravity dust collector is arranged in line with the dry quenching furnace 10 and the boiler 30, and the dry quenching system has a large floor area.

[0037] To improve the dust collection efficiency of the dry quenching system and reduce the floor area of the dry quenching equipment, the present application provides a dry quenching system. The dry quenching system and the dry quenching equipment provided by the present application will be described in detail below with reference to the accompanying drawings.

[0038] An embodiment of the first aspect of the present application provides a dry quenching system, as shown in Figures 2 to 8 The dry quenching system includes a dry quenching furnace 1, two primary dynamic dust collectors 2, a boiler 3, a first gas outlet pipeline 100, a second gas outlet pipeline 200, a first gas inlet pipeline 300, a circulating fan 5, and a heat pipe heat exchanger 6. The first gas outlet pipeline 100 connects the dry quenching furnace 1 and the boiler 3, and the second gas outlet pipeline 200 connects the dry quenching furnace 1 and the boiler 3. The two primary dynamic dust collectors 2 are arranged on the first gas outlet pipeline 100 and the second gas outlet pipeline 200, respectively, and are located on both sides of the dry quenching furnace 1 or the boiler 3. The first gas inlet pipeline 300 connects the dry quenching furnace 1 and the boiler 3. The circulating fan 5 is arranged on the first gas inlet pipeline 300. The heat pipe heat exchanger 6 is arranged on the first gas inlet pipeline 300, and the heat pipe heat exchanger 6 is located on the side of the circulating fan 5 close to the dry quenching furnace 1. The circulating fan 5 or the heat pipe heat exchanger 6 is arranged below the boiler 3.

[0039] In the present application, as Figure 2As shown, the circulating gas in the dry quenching furnace 1 is heated after absorbing the sensible heat of the red coke in the dry quenching furnace 1, and then flows into the first gas outlet pipeline 100 and the second gas outlet pipeline 200. After being filtered by the primary power dust collector 2 on the first gas outlet pipeline 100 and the second gas outlet pipeline 200, the heated circulating gas enters the boiler 3, exchanges heat with the feed water in the boiler 3, and is cooled. The cooled circulating gas reenters the dry quenching furnace 1 through the first gas inlet pipeline 300, realizing the recycling of the heat generated in the red coke coking process in the dry quenching furnace 1. In the present application, the primary power dust collector 2 is arranged on the first gas outlet pipeline 100 and the second gas outlet pipeline 200, respectively. The primary power dust collector 2 has good dust removal performance, which can greatly reduce the content of impurities such as coke powder in the circulating gas. Moreover, the two primary power dust collectors 2 arranged on both sides of the boiler 3 can further reduce the content of impurities such as coke powder in the circulating gas and improve the dust removal efficiency of the dry quenching system. In addition, the installation position of the primary power dust collector 2 is flexible, and the primary power dust collector 2 does not need to be arranged in line with the boiler 3 and the dry quenching furnace 1. Therefore, the position of the boiler 3 can be raised, and the circulating fan 5 or the heat pipe heat exchanger 6 can be arranged below the boiler 3. The space below the boiler 3 can be fully utilized in the arrangement of the dry quenching equipment, the space utilization rate of the dry quenching equipment in the height direction is increased, the arrangement of various devices in the dry quenching equipment is compact, and the floor area of the dry quenching equipment is reduced.

[0040] As shown in FIG. 1, Figure 2 As shown in FIG. 1, Figure 5 As shown in FIG. 1, Figure 7 As shown in FIG. 1, the first gas outlet pipeline 100 and the second gas outlet pipeline 200 are symmetrically arranged on both sides of the dry quenching furnace 1. The arrangement of the two gas outlet pipelines enables the circulating gas in the dry quenching furnace 1 to be symmetrically discharged from both sides, makes the amount of circulating gas flowing out of each gas outlet of the dry quenching furnace 1 more uniform, reduces the path of the circulating gas in the annular air duct of the dry quenching furnace 1, further improves the circulation efficiency of the circulating gas in the dry quenching furnace 1, enables the circulating gas to more simply and quickly enter the boiler 3 through the first gas outlet pipeline 100 and the second gas outlet pipeline 200, reduces the heat loss of the dry quenching system, and enables the length and arrangement of the first gas outlet pipeline 100 and the second gas outlet pipeline 200 to be more balanced, thereby improving the stability of the dry quenching system. In addition, the circulating gas flowing out of the two gas outlet pipelines can also reduce the straight-line distance between the dry quenching furnace 1 and the boiler 3, makes the layout of the devices such as the dry quenching furnace 1 and the boiler 3 in the dry quenching equipment more compact, and reduces the floor area of the dry quenching equipment.

[0041] As shown in FIG. 1, Figure 2 As shown in FIG. 1, Figure 5 As shown in FIG. 1,Figure 7 As shown, the dry quenching system includes two primary power dust collectors 2, located between the boiler 3 and the dry quenching furnace 1, and respectively installed on the first outlet pipe 100 and the second outlet pipe 200. Installing primary power dust collectors 2 on the first outlet pipe 100 and / or the second outlet pipe 200 allows for primary filtration of the circulating gas flowing out of the dry quenching furnace 1, reducing the content of impurities such as coke powder in the circulating gas flowing into the boiler 3. This reduces the probability of wear on the inner heating surfaces of the boiler 3 caused by impurities such as coke powder entering the boiler 3, improving the stability of the dry quenching equipment, extending the service life of the boiler 3, and saving costs.

[0042] Optional, such as Figure 2 As shown, two single-stage power dust collectors 2 can be symmetrically arranged on both sides of the boiler 3, and connected to the dry quenching furnace 1 through high-temperature pipes lined with inner bricks. The separated coke powder is transported to the outside of the dry quenching system by pneumatic conveying. Figure 5 and Figure 7 As shown, two single-stage power dust collectors 2 can also be symmetrically arranged on both sides of the dry quenching furnace 1, and connected to the dry quenching furnace 1 through high-temperature pipes of the inner lining brick. The separated coke powder is transported to the outside of the dry quenching system by pneumatic conveying.

[0043] In the embodiments of this application, such as Figure 2 , Figure 5 and Figure 7 As shown, the circulating fan 5 is installed on the first air inlet pipe 300. The circulating fan 5 can pressurize the circulating gas, providing power for the circulation process. The circulating fan 5 can adjust its speed and regulate the circulating air volume according to the operating conditions of the dry quenching system. Optionally, the circulating fan 5 can be a double-suction circulating fan 5.

[0044] In the embodiments of this application, such as Figure 2 , Figure 5 and Figure 7 As shown, the heat pipe heat exchanger 6 is installed on the first air inlet pipe 300, and the heat pipe heat exchanger 6 is located between the circulating fan 5 and the dry quenching furnace 1. Figure 3 As shown, Figure 3A simplified structure diagram of a dry quenching system in the present application is shown in the figure, wherein the arrow direction represents the flow direction of the circulating gas in the dry quenching system. The circulating gas sequentially passes through the dry quenching furnace 1, the boiler 3 and the circulating fan 5 to reach the heat pipe heat exchanger 6 on the first gas inlet pipeline 300, is absorbed and heat-exchanged by the heat pipe heat exchanger 6 for further cooling treatment, and then reenters the dry quenching furnace 1 to exchange heat with the red coke in the dry quenching furnace 1 for the next cycle. The heat pipe heat exchanger 6 is arranged before the dry quenching furnace 1. After the circulating gas enters the heat pipe heat exchanger 6, the heat pipe heat exchanger 6 can cool the circulating gas in one step, so that the circulating gas can better cool the coke in the dry quenching furnace 1 after entering the dry quenching furnace 1, thereby reducing the coke discharge temperature of the dry quenching furnace 1.

[0045] As shown in the present application, Figure 2 and Figure 7 , the heat pipe heat exchanger 6 can be arranged below the boiler 3 and the circulating fan 5 can be arranged around the boiler 3, so as to reduce the floor area of the dry quenching equipment. When the heat pipe heat exchanger 6 is arranged below the boiler 3, the flow direction of the circulating gas in the dry quenching system is shown in Figure 3 , wherein the arrow direction represents the flow direction of the circulating gas. As shown in Figure 3 , the circulating gas flows out of the dry quenching furnace 1 after heat exchange with the coke, flows to the primary power dust collector 2 through the first gas outlet pipeline 100 and the second gas outlet pipeline 200, enters the boiler 3 after one-time filtration by the primary power dust collector 2, flows out of the boiler 3 after heat exchange with the feed water in the boiler 3, sequentially flows through the circulating fan 5 and the heat pipe heat exchanger 6 arranged below the boiler 3 through the first gas inlet pipeline 300, and finally flows to the dry quenching furnace 1 for recycling.

[0046] As shown in the present application, Figure 5 , the circulating fan 5 can also be arranged below the boiler 3 and the heat pipe heat exchanger 6 can be arranged around the boiler 3, so as to reduce the floor area of the dry quenching equipment. When the circulating fan 5 is arranged below the boiler 3, the flow direction of the circulating gas in the dry quenching system is shown in Figure 6 , wherein the arrow direction represents the flow direction of the circulating gas. As shown in Figure 6 , the circulating gas flows out of the dry quenching furnace 1 after heat exchange with the coke, flows to the primary power dust collector 2 through the first gas outlet pipeline 100 and the second gas outlet pipeline 200, enters the boiler 3 after one-time filtration by the primary power dust collector 2, flows out of the boiler 3 after heat exchange with the feed water in the boiler 3, sequentially flows through the circulating fan 5 arranged below the boiler 3 and the heat pipe heat exchanger 6 arranged between the boiler 3 and the dry quenching furnace 1 through the first gas inlet pipeline 300, and finally flows to the dry quenching furnace 1 for recycling.

[0047] The dry quenching system provided by the embodiments of the present application is arranged as follows: the circulating fan 5 or the heat pipe heat exchanger 6 is arranged below the boiler 3, so that the space below the boiler 3 is fully utilized in the arrangement of the dry quenching equipment, the space utilization rate of the dry quenching equipment in the height direction is increased, the arrangement of each device in the dry quenching equipment is compact, and the floor area of the dry quenching equipment is reduced.

[0048] The dry quenching equipment provided by the embodiments of the present application adopts a new dry quenching process arrangement form of a planar longitudinal annular intersecting type. As shown in Figure 4 , the position of the boiler 3 is lifted, the circulating fan 5 or the heat pipe heat exchanger 6 is arranged below the boiler 3, the space below the boiler 3 is fully utilized in the arrangement of the dry quenching equipment, so that the dry quenching furnace 1, the boiler 3 and the circulating fan 5 are connected to form a ring in the three-dimensional arrangement, or the dry quenching furnace 1, the boiler 3 and the heat pipe heat exchanger 6 are connected to form a ring in the three-dimensional arrangement, a three-dimensional annular closed arrangement form in the longitudinal direction of the dry quenching equipment is realized. In addition, since the first gas outlet pipeline 100 and the second gas outlet pipeline 200 are arranged, the boiler 3, the dry quenching furnace 1 and the two gas outlet pipelines are connected to form a ring, so that a ring closed arrangement form in the plane of the dry quenching equipment is realized, and then the new dry quenching process arrangement form of the planar longitudinal annular intersecting type in the present application is realized, the arrangement of the dry quenching equipment is compact, the floor area of the dry quenching equipment is reduced, and the stability of the dry quenching equipment is improved.

[0049] Optionally, the first gas outlet pipeline 100, the second gas outlet pipeline 200 and the first gas inlet pipeline 300 in the embodiments of the present application can be high-temperature flues, and the types of the first gas outlet pipeline 100, the second gas outlet pipeline 200 and the first gas inlet pipeline 300 can be set according to actual needs, which are not limited in the present application.

[0050] Optionally, the dry quenching system in the embodiments of the present application can further include an elevator 7, as shown in Figure 4 , Figure 5 and Figure 7 , the elevator 7 is arranged outside the framework of the dry quenching furnace 1, and is used for facilitating the observation of the working state of the dry quenching furnace 1 by the inspection and maintenance personnel.

[0051] In some embodiments, as shown in Figure 2 , Figure 5 and Figure 7 , the dry quenching furnace 1 is provided with a first gas outlet 101, a second gas outlet 102 and a first gas inlet 103, the first gas outlet 101 and the second gas outlet 102 are arranged on the two sides of the dry quenching furnace 1; the boiler 3 is provided with a second gas inlet 301 and a third gas outlet 302; the first gas outlet pipeline 100 is connected to the first gas outlet 101 and the second gas inlet 301; the second gas outlet pipeline 200 is connected to the second gas outlet 102 and the second gas inlet 301; and the first gas inlet pipeline 300 is connected to the third gas outlet 302 and the first gas inlet 103.

[0052] The dry quenching furnace 1 is a main component of the dry quenching coke device, the upper part of the dry quenching furnace 1 is a pre-storage section, the middle part is a chute area, and the lower part is a cooling section. The outer periphery of the pre-storage section is provided with an annular air duct for collecting multiple chute gas flows, and the annular air duct is composed of an inner wall and an outer wall. The inner wall of the annular air duct is a single wall, and the inner wall has a large span in the height direction, i.e., the height of the inner wall is high. The outer wall is located outside the inner wall and does not contact the coke. The surface of the inner wall of the annular air duct needs to withstand the impact of the red coke and the abrasion of the coke moving downward, so the stability of the inner wall in the annular air duct is very important. In the related art, as shown in FIG. 1, in order to ensure the discharge amount of the high-temperature flue gas in the dry quenching furnace 10, the size of the gas outlet on the dry quenching furnace 10 in the height direction is large, so that the size of the annular air duct in the dry quenching furnace 10 in the height direction is large, which makes the annular air duct prone to collapse, resulting in low stability of the dry quenching furnace 10 and low stability of the dry quenching coke device. The high-temperature flue gas is the circulating gas after absorbing heat in the dry quenching furnace 10. Figure 1

[0053] In the embodiments of the present application, as shown in FIG. 2, the first gas outlet 101 of the dry quenching furnace 1 is communicated with the second gas inlet 301 of the boiler 3 through the first gas outlet pipeline 100, the second gas outlet 102 of the dry quenching furnace 1 is communicated with the second gas inlet 301 of the boiler 3 through the second gas outlet pipeline 200, and the third gas outlet 302 of the boiler 3 is communicated with the first gas inlet 103 of the dry quenching furnace 1 through the first gas inlet pipeline 300. Two gas outlets of the circulating gas are arranged on the dry quenching furnace 1, i.e., the circulating gas in the dry quenching furnace 1 is discharged through the first gas outlet 101 and the second gas outlet 102 at the same time, which can reduce the size of the first gas outlet 101 and / or the second gas outlet 102 on the dry quenching furnace 1 without affecting the discharge amount of the circulating gas in the dry quenching furnace 1. Specifically, the cross-sectional area of the first gas outlet 101 or the second gas outlet 102 on the dry quenching furnace 1 is reduced by about 60% to 70%, so that the gas outlet of the dry quenching furnace 1 is more stable and is not easy to deform, and the height of the annular air duct of the dry quenching furnace 1 is reduced, for example, the height of the annular air duct of the dry quenching furnace 1 is reduced by 1 m to 1.5 m, so that the height of the annular air duct is reduced by about 20%, the center of gravity of the annular air duct is reduced, the annular air duct is more stable, the probability of collapse of the inner wall of the annular air duct is reduced, and the stability of the operation of the dry quenching furnace 1 is improved. Figure 2 Figure 5 Figure 7 As shown in FIG. 2 and FIG. 3, the first gas outlet 101 and the second gas outlet 102 can be symmetrically arranged on the two sides of the dry quenching furnace 1, so that the circulating gas in the dry quenching furnace 1 can be symmetrically discharged from the two sides, the discharge amount of the circulating gas in the dry quenching furnace 1 can be improved, the circulating efficiency of the circulating gas in the dry quenching furnace 1 is further improved, the circulating gas can more simply and quickly enter the boiler 3 through the first gas outlet pipeline 100 and the second gas outlet pipeline 200, and the heat loss is reduced.

[0054] ​​​In some embodiments, as shown in Figure 2 and Figure 5 two second air inlets 301 are arranged on the boiler 3, the first air outlet 101 is communicated with one second air inlet 301 through the first air outlet pipeline 100, and the second air outlet 102 is communicated with the other second air inlet 301 through the second air outlet pipeline 200.

[0055] In the embodiments of the present application, as shown in Figure 2 and Figure 5 when two second air inlets 301 are arranged on the boiler 3, the boiler 3 is communicated with the first air outlet pipeline 100 and the second air outlet pipeline 200 through the two second air inlets 301 respectively, so as to be communicated with the first air inlet 103 and the second air inlet 301, and the circulating gas flowing out of the dry quenching furnace 1 can flow to the boiler 3 uniformly and rapidly through the first air outlet pipeline 100 and the second air outlet pipeline 200, so that the circulating gas can be more uniformly and rapidly exchanged with the feed water in the boiler 3, and the heat loss in the dry quenching system is reduced.

[0056] Optionally, when two second air inlets 301 are arranged on the boiler 3, the two second air inlets 301 can be symmetrically arranged on the two sides of the boiler 3, so as to make the lengths and arrangements of the first air outlet pipeline 100 and the second air outlet pipeline 200 more balanced, and improve the stability of the dry quenching system.

[0057] In some embodiments, as shown in Figure 7 only one second air inlet 301 is arranged on the boiler 3. When one second air inlet 301 is arranged on the boiler 3, the first air outlet 101 and the second air outlet 102 are symmetrically arranged on the two sides of the annular air duct of the dry quenching furnace 1, the first air outlet pipeline 100 is communicated with the first air outlet 101, the second air outlet pipeline 200 is communicated with the second air outlet 102, and the first air outlet pipeline 100 and the second air outlet pipeline 200 close to one side of the boiler 3 can be collected into one pipeline, so as to be communicated with the second air inlet 301, and the dry quenching furnace 1 is communicated with the boiler 3.

[0058] In some embodiments, as shown in Figure 7 and Figure 8 the fourth air outlet 303 is further arranged on the boiler 3, the third air outlet 302 and the fourth air outlet 303 are located on the two sides of the boiler 3; the first air inlet pipeline 300 includes a first pipe section 310, a second pipe section 320 and a third pipe section 330, the third air outlet 302 is communicated with the air inlet side 501 of the circulating fan 5 through the first pipe section 310, the fourth air outlet 303 is communicated with the air inlet side 501 of the circulating fan 5 through the second pipe section 320, and the air outlet side 502 of the circulating fan 5 is communicated with the first air inlet 103 of the dry quenching furnace 1 through the third pipe section 330.

[0059] In the embodiment of the present application, the circulating fan 5 can provide power for the circulating gas to generate the airflow from the air inlet side 501 to the air outlet side 502. As shown in Figure 7 The third air outlet 302 and the fourth air outlet 303 are located on both sides of the boiler 3, the third air outlet 302 is communicated with the air inlet side 501 of the circulating fan 5 through the first pipe section 310, and the fourth air outlet 303 is communicated with the air inlet side 501 of the circulating fan 5 through the second pipe section 320. The circulating fan 5 includes two air inlet sides 501, so that the circulating gas flowing out of the boiler 3 can flow to the circulating fan 5 uniformly and quickly through the first pipe section 310 and the second pipe section 320. After the circulating gas pressurized by the circulating fan 5 is further cooled, it enters the heat pipe heat exchanger 6 through the third pipe section 330 from the air outlet side 502, and then reenters the dry quenching furnace 1 through the first air inlet 103 to exchange heat with the red coke in the dry quenching furnace 1.

[0060] In the embodiment of the present application, as shown in Figure 7 The third air outlet 302 and the fourth air outlet 303 are located on both sides of the boiler 3, and two air inlet sides 501 are arranged on both sides of the circulating fan 5, so that the circulating gas in the boiler 3 can enter the circulating fan 5 uniformly and quickly, and the circulation efficiency of the circulating gas between the boiler 3 and the circulating fan 5 can be improved, thereby improving the working efficiency of the dry quenching device. The arrangement of the two air outlets and the two air inlet sides 501 can make the lengths and arrangements of the first pipe section 310 and the second pipe section 320 more balanced, thereby further improving the stability of the dry quenching system.

[0061] The dry quenching system plane in the embodiment of the present application can also adopt a double-loop compact arrangement, as shown in Figure 7 and Figure 8 That is, the dry quenching furnace 1, the two primary power type dust collectors 2 and the boiler 3 are arranged in a loop in the plane, and the boiler 3, the two secondary power type dust collectors 4 and the circulating fan 5 are arranged in a loop in the plane, so that the dry quenching system plane as a whole is arranged in a double-loop type. When the dry quenching system plane as a whole is arranged in a double-loop type, the devices in the dry quenching system can be arranged compactly, and the lengths and arrangements of the connecting pipelines between the devices are more balanced, which not only can reduce the floor area of the dry quenching device, but also can improve the stability of the dry quenching device.

[0062] In the embodiment of the present application, when the dry quenching system plane as a whole is arranged in a double-loop type, the circulating gas flow direction schematic diagram is shown in Figure 8 The arrow direction in the figure is the flow direction of the circulating gas. As shown in Figure 8As shown, the circulating gas exchanges heat with the coke after flowing out of the first gas outlet 101 and the second gas outlet 102 of the dry quenching furnace 1, and is filtered once by the first-stage power dust collector 2 on the first gas pipeline 100 and the second gas pipeline 200, and then flows to the second gas inlet 301 through the first gas pipeline 100 and the second gas pipeline 200 which are gathered into one pipeline near the side of the boiler 3, and then enters the boiler 3 through the second gas inlet 301. The circulating gas exchanges heat with the feed water in the boiler 3, and then flows out of the third gas outlet 302 and the fourth gas outlet 303, is filtered twice by the second-stage power dust collector 4 on the first pipe section 310 and the second pipe section 320 of the first gas pipeline 300, and then flows into the circulating fan 5 through the two air inlet sides 501 of the circulating fan 5. The circulating gas is pressurized by the circulating fan 5, and then continues to flow into the heat pipe heat exchanger 6 arranged below the boiler 3 through the third pipe section 330 of the first gas pipeline 300, and finally flows to the first gas inlet 103 and then reenters the dry quenching furnace 1 for circulation.

[0063] In some embodiments, as shown in Figure 2 , Figure 5 and Figure 7 , the dry quenching system further comprises a second-stage power dust collector 4, and the second-stage power dust collector 4 is arranged on the first pipe section 310 and / or the second pipe section 320.

[0064] In the embodiments of the present application, as shown in Figure 2 and Figure 5 , the dry quenching system can comprise one second-stage power dust collector 4, and at this time, the second-stage power dust collector 4 can be arranged only on the first pipe section 310 or the second pipe section 320 to perform secondary filtration on the circulating gas in the dry quenching system. Alternatively, as shown in Figure 7 , the dry quenching system can comprise two second-stage power dust collectors 4, and at this time, the two second-stage power dust collectors 4 are arranged on the first pipe section 310 and the second pipe section 320 respectively to better perform secondary filtration on the circulating gas in the dry quenching system.

[0065] In addition, when the first gas pipeline 100 and the second gas pipeline 200 are both provided with a first-stage power dust collector 2, the two first-stage power dust collectors 2 can meet the separation requirements of the dry quenching system for the impurities such as coke powder in the circulating gas. Correspondingly, the first pipe section 310 and the second pipe section 320 can also not be provided with a second-stage power dust collector 4 to reduce the floor area of the dry quenching system and reduce the manufacturing and installation costs of the dry quenching system. In the embodiments of the present application, the number and installation positions of the second-stage power dust collectors 4 can be arranged according to actual requirements, which are not limited in the present application.

[0066] In the embodiments of the present application, as shown in Figure 2 , Figure 5 and Figure 7As shown, the secondary dynamic dust collector 4 can be arranged on the first pipe section 310 and / or the second pipe section 320 through the boiler steel structure and close to the boiler 3, for performing secondary filtration on the circulating gas flowing out of the boiler 3, further reducing the content of the coke powder and other impurities in the circulating gas, improving the separation efficiency, and improving the stability of the dry quenching device. In addition, the secondary dynamic dust collector 4 is arranged between the boiler 3 and the circulating fan 5, and can also be used to protect the circulating fan 5, reduce the content of the coke powder and other impurities in the circulating gas entering the circulating fan 5 from the boiler 3, thereby reducing the probability of the coke powder and other impurities causing wear to the circulating fan 5, prolonging the service life of the circulating fan 5, and improving the stability of the dry quenching device.

[0067] In some embodiments, the primary dynamic dust collector 2 is a cyclone dust collector, and the secondary dynamic dust collector 4 is a cyclone dust collector.

[0068] In the embodiments of the present application, the primary dynamic dust collector 2 is a cyclone dust collector instead of a traditional gravity dust collector, and the secondary dynamic dust collector 4 is also a cyclone dust collector. Compared with the gravity dust collector in the related art, the cyclone dust collector has the advantages of high separation efficiency, small floor area, and low cost, can further improve the separation efficiency of the coke powder and other impurities in the dry quenching system, reduce the content of the coke powder and other impurities in the circulating gas at the inlet of the boiler 3, reduce the probability of the coke powder and other impurities causing wear to the boiler 3, prolong the service life of the boiler 3, save costs, and the cyclone dust collector has a small floor area, facilitating the arrangement of the dry quenching device and further reducing the floor area of the dry quenching device.

[0069] Optionally, the primary dynamic dust collector 2 and the secondary dynamic dust collector 4 can also be pulse dust collectors, or other dust collectors that separate impurities through power, which are not limited in the present application.

[0070] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A dry quenching system, characterized in that, The dry quenching system comprises: a dry quenching furnace (1); a boiler (3); a first gas outlet pipeline (100) and a second gas outlet pipeline (200), wherein the first gas outlet pipeline (100) is connected with the dry quenching furnace (1) and the boiler (3), and the second gas outlet pipeline (200) is connected with the dry quenching furnace (1) and the boiler (3); two first-stage dynamic dust collectors (2) arranged on the first gas outlet pipeline (100) and the second gas outlet pipeline (200) respectively, and located on both sides of the dry quenching furnace (1) or the boiler (3); a first gas inlet pipeline (300) connected with the dry quenching furnace (1) and the boiler (3); a circulating fan (5) arranged on the first gas inlet pipeline (300); a heat pipe heat exchanger (6) arranged on the first gas inlet pipeline (300) and located on the side of the circulating fan (5) close to the dry quenching furnace (1); the circulating fan (5) or the heat pipe heat exchanger (6) is arranged below the boiler (3); the dry quenching furnace (1) is provided with a first gas outlet (101), a second gas outlet (102) and a first gas inlet (103), and the first gas outlet (101) and the second gas outlet (102) are arranged on both sides of the dry quenching furnace (1); the boiler (3) is provided with a second gas inlet (301) and a third gas outlet (302); the first gas outlet pipeline (100) is connected with the first gas outlet (101) and the second gas inlet (301), the second gas outlet pipeline (200) is connected with the second gas outlet (102) and the second gas inlet (301), and the first gas inlet pipeline (300) is connected with the third gas outlet (302) and the first gas inlet (103); the boiler (3) is further provided with a fourth gas outlet (303), and the third gas outlet (302) and the fourth gas outlet (303) are located on both sides of the boiler (3); the first gas inlet pipeline (300) comprises a first pipe section (310), a second pipe section (320) and a third pipe section (330), the third gas outlet (302) is connected with the air inlet side (501) of the circulating fan (5) through the first pipe section (310), the fourth gas outlet (303) is connected with the air inlet side (501) of the circulating fan (5) through the second pipe section (320), and the air outlet side (502) of the circulating fan (5) is connected with the first gas inlet (103) of the dry quenching furnace (1) through the third pipe section (330).

2. The dry quenching system according to claim 1, characterized in that, The dry quenching system further comprises a second-stage dynamic dust collector (4) arranged on the first pipe section (310) and / or the second pipe section (320).

3. The dry quenching system according to claim 1, characterized in that, The first-stage dynamic dust collector (2) is a cyclone dust collector.

4. The dry quenching system according to claim 2, characterized in that, The secondary power dust collector (4) is a cyclone dust separator.

Images