Dry quenching system

Abstract

The embodiment of the utility model provides a dry quenching system. The dry quenching system comprises a dry quenching furnace, at least one primary cyclone dust collector, a boiler, a secondary dust collector, a circulating fan, a heat pipe heat exchanger and an air leading-in device, wherein the dry quenching furnace, the at least one primary cyclone dust collector and the boiler are communicated through a high-temperature flue gas pipeline; the dry quenching furnace comprises at least one gas outlet, the gas outlet of the dry quenching furnace is communicated with the gas inlet of the primary cyclone dust collector, and the gas outlet of the primary cyclone dust collector is communicated with the gas inlet of the boiler; the air leading-in device comprises at least two air leading-in sections, the air leading-in sections are communicated with the high-temperature flue gas pipeline, and the air leading-in sections are arranged between an air outlet of the dry quenching furnace and an air inlet of the primary cyclone dust collector and between an air outlet of the primary cyclone dust collector and an air inlet of the boiler respectively; the air leading-in section is used for leading air into the high-temperature flue gas pipeline.

Description

Technical Field

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

[0002] As an environmentally friendly and energy-saving technology, CDQ has been widely adopted in coking plants in recent years. A CDQ system consists of a CDQ furnace and a primary dust collector. The primary dust collector removes dust from the circulating gas. Conventional primary dust collectors use gravity dust removal, which has low dust removal efficiency. The circulating gas entering the boiler is high in dust, causing significant erosion of the boiler tubes and potentially causing tube bursts. Cyclone dust collectors, on the other hand, have high dust removal efficiency, reducing the dust content in the circulating gas entering the boiler, minimizing erosion of the boiler tubes and extending the boiler's service life.

[0003] Furthermore, the high-temperature circulating gas at the CDQ furnace outlet contains combustible components such as CO and H₂. To ensure system safety and reduce the amount of combustible components in the circulating gas, air must be introduced into the system to allow the O₂ in the introduced air to react with the CO and H₂ in the circulating gas. In existing technology, air is introduced into the CDQ furnace's annular duct. Because the high-temperature circulating gas carries a large amount of coke fines, the O₂ in the introduced air also reacts with the coke fines, causing coke burn and increasing the heat content of the circulating gas. This excess heat in the circulating gas can lead to excessively high circulating gas temperatures at the boiler inlet, potentially causing boiler tube bursts, shortening the boiler's service life, and reducing its thermal efficiency. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a coke dry quenching system to solve the problems of severe boiler tube wear and boiler tube burst in the prior art. The specific technical solution is as follows:

[0005] An embodiment of the present application provides a dry quenching system, which includes a dry quenching furnace, at least one primary cyclone dust collector, and a boiler, wherein the dry quenching furnace, at least one primary cyclone dust collector, and the boiler are connected through a high-temperature flue gas duct; as well as a secondary dust collector, a circulating fan and a heat pipe heat exchanger, and an air introduction device, wherein the dry quenching furnace includes at least one air outlet, the air outlet of the dry quenching furnace is connected to the air inlet of the primary cyclone dust collector, and the air outlet of the primary cyclone dust collector is connected to the air inlet of the boiler; the air introduction device includes at least two air introduction sections, the air introduction sections are connected to the high-temperature flue gas duct, and the air introduction sections are respectively arranged between the air outlet of the dry quenching furnace and the air inlet of the primary cyclone dust collector, and between the air outlet of the primary cyclone dust collector and the air inlet of the boiler, and the air introduction section is used to introduce air into the high-temperature flue gas duct.

[0006] In some embodiments, the air introduction device includes at least one blower, and the air introduction section includes at least one first air introduction pipe; the at least one blower is connected to the air inlet end of the at least one first air introduction pipe, and is used to blow air into the first air introduction pipe; the air outlet end of the first air introduction pipe is connected to the high-temperature flue gas pipe; a first valve and a regulating valve are provided on the first air introduction pipe, the first valve is used to control the on and off of the gas in the first air introduction pipe, and the regulating valve is used to adjust the gas flow in the first air introduction pipe.

[0007] In some embodiments, the air introduction section also includes at least one second air introduction pipe, the air inlet end of the second air introduction pipe is connected to the outside, the air outlet end of the second air introduction pipe is connected to the first air introduction pipe, and the air inlet end of the second air introduction pipe is arranged between the first valve and the regulating valve; a second valve is provided on the second air introduction pipe, and the second valve is used to control the on and off of the gas in the second air introduction pipe.

[0008] In some embodiments, a protective net is provided at the air inlet end of the second air introduction duct, and the protective net is used to prevent external debris from being sucked into the second air introduction duct.

[0009] In some embodiments, the air introduction section further includes a first main pipe and a second main pipe; there are multiple first air introduction pipes, and multiple first air introduction pipes are connected to the first main pipe, and multiple first air introduction pipes are connected to the blower through the first main pipe; there are multiple second air introduction pipes, and multiple second air introduction pipes are connected to the second main pipe, and multiple second air introduction pipes are connected to the external air through the second main pipe.

[0010] In some embodiments, the first air inlet pipe is further provided with a flow detection device and a pressure measuring device, the flow detection device is used to detect the gas flow in the first air inlet pipe, and the pressure measuring device is used to detect the pressure of the gas in the first air inlet pipe.

[0011] In some embodiments, the air introduction section further includes a flue interface pipe group, which includes a nitrogen charging device and an interface pipe. One end of the interface pipe is connected to the air outlet end of the first air introduction pipe, and the other end is connected to the high-temperature flue gas pipe. The nitrogen charging device is arranged in the interface pipe.

[0012] In some embodiments, there are two primary cyclone dust collectors, and the two primary cyclone dust collectors are symmetrically arranged.

[0013] In some embodiments, the dry coke quenching system further includes an air heat exchange device, the air heat exchange device includes an air heat exchange pipe, the air heat exchange pipe includes a bent section and a straight section; one end of the bent section is connected to the high-temperature flue gas duct, and the other end is connected to one end of the straight section, and the other end of the straight section is connected to the air outlet end of the air inlet section; the outer wall of the straight section is in contact with the outer wall of the high-temperature flue gas duct; the side wall of the high-temperature flue gas duct is provided with a heat insulation layer, and the position of the heat insulation layer corresponds to the straight section.

[0014] In some embodiments, a plurality of staggered guide plates are provided inside the air heat exchange tube, and the plurality of guide plates form a serpentine air flow channel.

[0015] The dry coke quenching system provided in the embodiments of the present application includes a dry quenching furnace, at least one primary cyclone dust collector, a boiler, a secondary dust collector, a circulating fan and a heat pipe heat exchanger, and an air introduction device. The high-temperature circulating gas in the dry quenching furnace first passes through the primary cyclone dust collector for dust removal, so that the coke powder content of the circulating gas entering the boiler is greatly reduced, thereby reducing the damage of the coke powder to the boiler tubes; the high-temperature circulating gas enters the boiler for heat exchange, the circulating fan provides power for the circulation of the circulating gas, and the heat pipe heat exchanger can further cool the circulating gas.

[0016] The air introduction device includes at least two air introduction sections, located between the CDQ furnace and the primary cyclone, and between the primary cyclone and the boiler. By controlling the air introduction section to introduce air into the high-temperature flue gas duct between the primary cyclone inlet and the boiler inlet, it is possible to reduce coke burnout, stabilize the boiler inlet temperature and boiler steam production, and protect the boiler while ensuring the combustible component content in the circulating gas. By controlling the air introduction section to introduce air into the high-temperature flue gas duct between the CDQ furnace and the primary cyclone, the temperature of the primary cyclone inlet can be stabilized, preventing damage to the primary cyclone equipment due to overheating.

[0017] Of course, any product implementing the present application does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of a coke dry quenching system provided in an embodiment of the present application;

[0020] Figure 2 for Figure 1 Schematic diagram of the air introduction device in the CDQ system;

[0021] Figure 3 for Figure 1 Schematic diagram of the interface pipeline in the CDQ system;

[0022] Figure 4 for Figure 1 Schematic diagram of the air heat exchange device in the CDQ system.

[0023] Reference numerals:

[0024] CDQ furnace 10; CDQ furnace air outlet 101; primary cyclone dust collector 20; primary cyclone dust collector air inlet 201; boiler 30; boiler air inlet 301; air introduction device 40; air introduction section 41; first air introduction pipe 411; first valve 4111; regulating valve 4112; flow detection device 4113; pressure measuring device 4114; flue interface pipe group 412; nitrogen charging device 4121; interface pipe 4122; castable 41221; first A flange 4123; an outer sleeve 4124; an anchor claw 4125; an inner sleeve 4126; a second flange 4127; a blower 42; a second air inlet duct 413; a second valve 4131; a first main pipe 414; a high-temperature flue gas duct 50; a first air outlet duct 51; a second air outlet duct 52; a secondary dust collector 61; a circulating fan 62; a heat pipe heat exchanger 63; an air heat exchange device 70; a bent section 71; a straight section 72; an insulation layer 73; and a guide plate 74. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field based on this application are within the scope of protection of this application.

[0026] The present application provides a dry quenching system, such as Figure 1 and Figure 2As shown, the dry quenching system includes a dry quenching furnace 10, at least one primary cyclone dust collector 20, and a boiler 30, which are connected through a high-temperature flue gas duct 50; a secondary dust collector 61, a circulating fan 62, a heat pipe heat exchanger 63, and an air introduction device 40. The dry quenching furnace 10 includes at least one air outlet, the air outlet 101 of the dry quenching furnace is connected to the air inlet 201 of the primary cyclone dust collector, and the air outlet of the primary cyclone dust collector 20 is connected to the air inlet 301 of the boiler; the air introduction device 40 includes at least two air introduction sections 41, which are connected to the high-temperature flue gas duct 50 and are respectively arranged between the air outlet 101 of the dry quenching furnace and the air inlet 201 of the primary cyclone dust collector, and between the air outlet of the primary cyclone dust collector 20 and the air inlet 301 of the boiler. The air introduction section 41 is used to introduce air into the high-temperature flue gas duct 50.

[0027] In the embodiment of the present application, the CDQ system includes a CDQ furnace 10, at least one primary cyclone dust collector 20, a boiler 30, a secondary dust collector 61, a circulating fan 62, a heat pipe heat exchanger 63, and an air introduction device 40. The high-temperature circulating gas in the CDQ furnace 10 first passes through the primary cyclone dust collector 20 for dust removal, which greatly reduces the coke powder content in the circulating gas entering the boiler 30, thereby reducing the damage caused by the coke powder to the boiler 30 tubes; the high-temperature circulating gas enters the boiler 30 for heat exchange, the circulating fan 62 provides power for the circulation of the circulating gas, and the heat pipe heat exchanger 63 can further cool the circulating gas. The air introduction device 40 includes at least two air introduction sections 41, which are respectively located between the CDQ furnace 10 and the primary cyclone dust collector 20 and between the primary cyclone dust collector 20 and the boiler 30. Air is introduced through the air introduction section 41 between the air inlet 201 of the primary cyclone dust collector and the air inlet 301 of the boiler, stabilizing the air inlet temperature and steam production of the boiler 30 and thus protecting the boiler 30. Air is introduced through the air introduction section 41 into the high-temperature flue gas duct 50 between the CDQ furnace 10 and the primary cyclone dust collector 20, stabilizing the temperature of the air inlet 201 of the primary cyclone dust collector and preventing damage to the primary cyclone dust collector 20 due to overheating.

[0028] Furthermore, by adjusting the amount of introduced air, the air inlet temperature of the boiler 30 and the steam production of the boiler 30 can be further and more accurately adjusted, as well as the temperature of the air inlet 201 of the primary cyclone dust collector.

[0029] Specifically, the CDQ system may further include a temperature detection device (not shown) and a gas analyzer (not shown). The temperature detection device is used to detect the circulating gas temperature at the inlet of the primary cyclone dust collector 20 and the inlet of the boiler 30, and the gas analyzer is used to detect the gas composition in the CDQ system. It should be noted that the inlet of the boiler 30 is also the air inlet of the boiler 30, and the outlet of the boiler 30 is also the air outlet of the boiler 30, and the same applies to other devices.

[0030] More specifically, temperature detection devices can be installed at the boiler's air inlet 301 and the primary cyclone's air inlet 201, respectively. They can also be placed on the high-temperature flue gas duct 50 connecting the boiler 30 and the primary cyclone 20, to detect the temperature of the circulating gas entering the boiler's air inlet 301 and the primary cyclone's air inlet 201. A gas analyzer is installed in the low-temperature section of the CDQ system. For example, along the flow direction of the circulating gas, the gas analyzer can be located between the boiler's air outlet 30 and the CDQ furnace's air outlet 101. The gas analyzer is used to detect the gas composition within the CDQ system. Therefore, by detecting the temperature and the composition of the combustible gas within the boiler 30, the air entering the CDQ system through the air inlet section 41 can be adjusted in a timely manner, improving the CDQ system's intelligence.

[0031] It should be noted that the number of primary cyclone dust collectors in the dry quenching system can be one or more, and multiple primary cyclone dust collectors are arranged in parallel. The dry quenching furnace 10 can have only one air outlet or multiple air outlets; the air outlet of the dry quenching furnace 10 can be set corresponding to the primary cyclone dust collector 20, that is, each air outlet of the dry quenching furnace 10 corresponds to one primary cyclone dust collector 20; the dry quenching furnace 10 can also have only one air outlet, and one air outlet corresponds to multiple primary cyclone dust collectors 20, and multiple primary cyclone dust collectors 20 share one air inlet, and the common air inlet is connected to the air outlet of the dry quenching furnace 10.

[0032] For example, when there are two primary cyclone dust collectors 20 and the CDQ furnace 10 has one air outlet, a partition is placed at the inlet of the primary cyclone dust collector to form two air inlet channels at the air inlet.

[0033] Currently, conventional CDQ primary dust collectors use gravity dust removal, primarily in two configurations: with or without retaining walls. These primarily remove large coke particles from high-temperature circulating gas, with a dust removal efficiency of less than 50%. Cyclone-based CDQ involves replacing gravity dust removal with a cyclone-based primary dust collector. This utilizes the centrifugal force generated by the rotating dust-laden gas to separate dust from the airflow, achieving a dry dust removal efficiency exceeding 90%. Compared to conventional primary dust collectors that use gravity dust removal, this method can reduce the dust content in the circulating gas entering the boiler. Cyclone dust removal can effectively prevent coke particles in the circulating gas from eroding the tubes of the CDQ boiler 30, extending the service life of the boiler 30, contributing to the continuous and stable production of the CDQ unit and improving the economic benefits of the coking enterprise.

[0034] Through this arrangement, the air introduction section 41 can be positioned at the air outlet of the CDQ furnace 10 and the air inlet of the boiler 30, ensuring the combustion of the combustible components in the CDQ high-temperature circulating gas and the air introduced by the air introduction section 41, thereby ensuring the safety of the CDQ device. Alternatively, the air introduction section 41 can be positioned at the high-temperature flue gas inlet and outlet of the primary cyclone dust collector 20.

[0035] Specifically, such as Figure 1 As shown, the high-temperature flue gas duct 50 includes a first air outlet duct 51 and a second air outlet duct 52. One end of the first air outlet duct 51 is connected to the air outlet 101 of the dry quenching furnace, and the other end is connected to the air inlet 201 of the primary cyclone dust collector. One end of the second air outlet duct 52 is connected to the air outlet of the primary cyclone dust collector 20, and the other end is connected to the air inlet 301 of the boiler. When the air inlet section 41 has two sections, the two air inlet sections 41 are located in the first air outlet duct 51 and the second air outlet duct 52, respectively. For ease of explanation, the air inlet section 41 located on the first air outlet duct 51 is defined as the first air inlet section, and the air inlet section 41 located on the second air outlet duct 52 is defined as the second air inlet section.

[0036] In practical applications, the primary control is, in principle, the air intake at the boiler 30 inlet or the primary cyclone 20 outlet, specifically the second air intake section between the primary cyclone 20 and the boiler 30. The air intake at the CDQ furnace 10 outlet or the primary cyclone 20 inlet serves as an auxiliary control, specifically the first air intake section between the CDQ furnace 10 and the primary cyclone 20. This minimizes the combustion of coke fines within the primary cyclone 20, reduces the combustion density of coke fines in the high-temperature gas before dust removal, reduces coke fines burnout, lowers the primary cyclone 20 outlet temperature, and reduces the probability of overheating and damage to the primary cyclone 20. It also allows for the recovery of more coke fines, achieving profitable coke recovery. It also stabilizes the boiler 30 inlet temperature and steam production.

[0037] The CDQ system provided in the embodiments of the present application can be used under different loads of the CDQ system. For example, when the CDQ system is operating at a low load, the circulating gas has already absorbed primary heat in the primary cyclone dust collector 20, so the circulating gas reaching the boiler 30 has relatively low heat, which may cause low-temperature sulfur corrosion in the low-temperature section of the boiler 30, leading to boiler pipe burst. Therefore, more air is introduced into the second air introduction section and less air is introduced into the first air introduction section, thereby reducing the combustion of coke dust in the primary cyclone dust collector 20 and on the high-temperature flue gas duct 50 between the CDQ furnace 10 and the primary cyclone dust collector 20, thereby reducing coke burnout. After the circulating gas passes through the primary cyclone dust collector 20 for dust removal, the air introduced by the second air introduction section can fully combust with the combustible gas in the circulating gas, thereby increasing the temperature in the boiler and thus protecting the boiler.

[0038] The dry coke quenching system provided in the embodiment of the present application can reasonably regulate the circulating gas temperature at the inlet of the primary cyclone dust collector 20 and the inlet of the boiler 30 through the form of segmented air introduction. During normal production, under the premise of ensuring that the circulating gas temperature at the boiler inlet does not exceed the temperature, less air is introduced into the first air introduction section and more air is introduced into the second air introduction section. Because the coke powder content in the circulating gas after the primary cyclone dust collector is relatively low, introducing more air into the second air introduction section can reduce coke burning and improve economic benefits. Introducing less air into the first air introduction section can reduce the heat generated by the combustion of air and coke powder, avoid overheating of the inlet of the primary cyclone dust collector 20, which may cause damage to the primary cyclone dust collector 20, and reduce coke burning.

[0039] During low-load CDQ production, the amount of high-temperature flue gas entering the boiler is small, and some heat is absorbed by the water-wall primary cyclone dust collector. This reduces the boiler's load, impacting steam production and quality. It can also easily cause corrosion in the boiler's low-temperature section, leading to tube bursts. To address this issue, more air can be introduced into the second air intake section, utilizing the heat generated by the combustion of air and combustible components in the circulating gas to maintain a stable flue gas temperature at the boiler 30 inlet.

[0040] It should be noted that the CDQ system further includes a secondary dust collector 61 , a circulating fan 62 and a heat pipe heat exchanger 63 which are sequentially connected via a gas pipeline. The air inlet of the secondary dust collector 61 is connected to the air outlet of the boiler 30 .

[0041] Specifically, there are two power sources for air introduction. One is to use the negative pressure area in the area of the dry quenching furnace 10, the primary cyclone dust collector 20, and the boiler 30 to introduce air by natural suction; the other method is forced blowing, using a blower 42 to pressurize the air and then introduce it through the pipeline valve group and the auxiliary detection device.

[0042] It should be noted that the air introduction section in the CDQ system may be entirely in the natural suction mode, or entirely in the forced blowing mode, or a combination of the two modes, which is not limited in this application.

[0043] For example, the first air introduction section and the second air introduction section both adopt the natural suction method, the first air introduction section and the second air introduction section can also both adopt the forced blowing method, the first air introduction section can adopt the natural suction method and the second air introduction section can adopt the forced blowing method, or the second air introduction section can adopt the natural suction method and the first air introduction section can adopt the forced blowing method.

[0044] As attached Figure 2 As shown, it is an arrangement mode in which the air introduction device 40 combines natural suction and forced blowing.

[0045] In some embodiments of the present application, the air introduction device 40 includes at least one blower 42, and the air introduction section 41 includes at least one first air introduction pipe 411; at least one blower 42 is connected to at least one first air introduction pipe 411, and the blower 42 is used to blow air into the first air introduction pipe 411; the first air introduction pipe 411 is provided with a first valve 4111 and a regulating valve 4112, the first valve 4111 is used to control the on and off of the gas in the first air introduction pipe 411, and the regulating valve 4112 is used to adjust the gas flow in the first air introduction pipe 411; the air inlet end of the first air introduction pipe 411 is connected to the blower 42, and the air outlet end is connected to the high-temperature flue gas pipe 50.

[0046] In the embodiment of the present application, the blower 42 provides power for introducing air. When the negative pressure within the CDQ system is insufficient, the blower 42 ensures that air can smoothly enter the high-temperature flue gas duct 50. The first valve 4111 controls the opening and closing of the first air introduction duct 411, thereby controlling whether air can enter the high-temperature flue gas duct 50. The regulating valve 4112 regulates the flow rate. The operator can manually adjust the regulating valve 4112 based on the temperature detected by the temperature detection device, thereby more accurately controlling the temperature of the circulating gas at the inlet of the boiler 30.

[0047] It should be noted that the number of blowers 42 may be one or more, and the number of first air introduction pipes 411 may be one or more. When there is one blower 42 and one first air introduction pipe 411, the air inlet end of the first air introduction pipe 411 is connected to the air outlet end of the blower 42, and the blower 42 blows air into the high-temperature flue gas pipe 50 through the first air introduction pipe 411.

[0048] like Figure 2As shown, when there is one blower 42 and multiple first air introduction pipes 411, that is, one blower 42 blows air to multiple air introduction sections 41, the air introduction device 40 can include a first manifold 414, and the multiple first air introduction pipes 411 are connected to the air outlet of the blower 42 via the first manifold 414. This arrangement only requires one blower 42 to complete the blowing of multiple air introduction sections 41, which can save equipment costs and reduce the footprint of the CDQ system. Multiple air introduction sections 41 can also correspond to multiple blowers 42, that is, the multiple blowers 42 are respectively connected to the multiple first air introduction pipes 411.

[0049] It should be noted that when there are multiple first air inlet pipes 411, the multiple first air inlet pipes 411 can be arranged in the same section of the high-temperature gas pipe. For example, multiple first air inlet pipes 411 can be arranged in the high-temperature flue gas pipe 50 between the primary cyclone dust collector 20 and the boiler 30, and the outlets of the multiple first air inlet pipes 411 are all connected to the high-temperature flue gas pipe 50 between the primary cyclone dust collector 20 and the boiler 30, and the high-temperature flue gas pipe 50 is also provided with multiple air inlets corresponding to the first air inlet pipes 411.

[0050] During the production process, a remote regulating valve 4112 can be used in the central control room to adjust the regulating valve 4112 group on the two sections of the air pipe to introduce different amounts of air according to the inlet temperature of the primary cyclone dust collector and the inlet temperature of the boiler 30, so that the inlet temperature of the primary cyclone dust collector and the inlet temperature of the boiler 30 are within the set value range.

[0051] By introducing air through regulating valves, temperature detection devices, etc., the amount of air introduced can be controlled to avoid excessive coke loss due to excessive air introduction, or incomplete combustion of combustible components due to insufficient air introduction.

[0052] Specifically, the regulating valve 4112 can be a pneumatic valve or an electric valve, and the operator can operate it automatically or manually remotely in the central control.

[0053] In some embodiments of the present application, the air introduction section 41 also includes at least one second air introduction pipe 413, the air inlet end of the second air introduction pipe 413 is connected to the outside world, and the air outlet end is connected to the first air introduction pipe 411, and the air inlet end of the second air introduction pipe 413 is arranged between the first valve 4111 and the regulating valve 4112; a second valve 4131 is provided on the second air introduction pipe 413, and the second valve 4131 is used to control the on and off of the gas in the second air introduction pipe 413.

[0054] In the embodiment of the present application, the forced introduction mode and the natural suction mode of the air introduction device are combined. According to the production needs, the natural suction or forced blowing mode can be adopted. If the natural suction mode is adopted, the blower 42 and the first valve 4111 are in the closed state, and the second valve 4131 is in the open state. According to the adjustment of the dry quenching production operating parameters, the amount of air introduced is automatically adjusted by the regulating valve 4112. If the forced blowing mode is adopted, the blower 42 and the first valve 4111 are in the open state, wherein the blower 42 can be configured with either industrial frequency or variable frequency, the second valve 4131 is in the closed state, and the amount of air introduced is automatically adjusted by the regulating valve 4112 (if the blower 42 is a variable frequency blower, the air introduction amount is adjusted in a large range by adjusting the frequency of the blower 42, and the air introduction amount is adjusted in a small range by adjusting the regulating valve 4112);

[0055] The first air inlet pipe 411 of the air inlet section 41 is also provided with a flow detection device 4113 and a pressure measuring device 4114. The flow detection device 4113 is used to detect the gas flow in the first air inlet pipe 411, and the pressure measuring device 4114 is used to detect the pressure of the gas in the first air inlet pipe 411. The flow detection device 4113 and the pressure measuring device 4114 respectively detect the flow and pressure of the introduced air.

[0056] It should be noted that, in an air introduction section 41, the number of second air introduction pipes 413 can be one or more. When the number of second air introduction pipes 413 is multiple, the air inlet ends of the multiple second air introduction pipes 413 are connected to the outside world, and the air outlet ends are connected to the first air introduction pipe. The first air introduction pipe can be provided with multiple air inlets corresponding to the second air introduction pipes 413.

[0057] The valves in the above embodiments, such as first valve 4111, regulating valve 4112, and second valve 4131, can be centrally operated automatically or manually, with manual adjustment or on-off functionality also available on-site. During production, the amount of air introduced into the two sections is adjusted in real time based on the primary cyclone inlet temperature, the boiler 30 inlet temperature, and the content of combustible components in the high-temperature gas. One operating mode uses the boiler 30 inlet temperature as the primary control parameter, adjusting the second-stage air intake based on the boiler 30 inlet temperature and combustible components. This involves primarily introducing air in the second stage, supplemented by the first stage. Because the high-temperature gas at the outlet of the primary cyclone dust collector 20 has already been cyclone-cleaned, the coke fines concentration in the high-temperature gas is relatively low. This introduced air helps reduce the ratio of coke fines to air combustion, thereby reducing coke fines burnout, while still ensuring system safety. When CDQ is operating at low load, the water-cooled primary cyclone dust collector 20 also absorbs some heat from the CDQ furnace 10 outlet gas. Therefore, adding air to the second stage helps stabilize the minimum operating load of the boiler 30 and protect it. The first stage is the first air intake stage, and the second stage is the second air intake stage.

[0058] Specifically, the first valve 4111 and the second valve 4131 may be butterfly valves or shut-off valves.

[0059] In some embodiments of the present application, a protective net (not shown) is provided at the air inlet end of the second air introduction duct 413 , and the protective net is used to prevent external debris from being sucked into the second air introduction duct 413 .

[0060] In some embodiments of the present application, a flow detection device 4113 and a pressure measuring device 4114 are also provided on the first air inlet pipe 411. The flow detection device 4113 is used to detect the gas flow in the first air inlet pipe 411, and the pressure measuring device 4114 is used to detect the pressure of the gas in the first air inlet pipe 411.

[0061] In an embodiment of the present application, the flow detection device 4113 can detect the gas flow in the first air inlet pipe 411 in real time, and the pressure measuring device 4114 can detect the pressure of the gas in the first air inlet pipe 411 in real time, so as to adjust the regulating valve 4112 in time according to the detection results to control the pressure and flow of the gas in the first air inlet pipe 411 to prevent the first air inlet pipe 411 from bursting or being damaged.

[0062] In some embodiments of the present application, the air introduction section 41 also includes a flue interface pipe group 412, the flue interface pipe group 412 includes a nitrogen charging device 4121 and an interface pipe 4122, one end of the interface pipe 4122 is connected to the air outlet end of the first air introduction pipe 411, and the other end is connected to the high-temperature flue gas pipe 50, and the nitrogen charging device 4121 is arranged in the interface pipe 4122.

[0063] In this embodiment, the nitrogen charging device 4121 can fill the high-temperature flue gas duct 50 with nitrogen to prevent excessive flammable gas in the high-temperature flue gas duct 50 from spontaneous combustion or explosion, thereby improving the safety of the gas circulation system. The interface pipe 4122 connects the first air introduction pipe 411 with the high-temperature flue gas duct 50.

[0064] Specifically, such as Figure 2 and Figure 3 As shown, the interface pipe 4122 in the flue interface pipe group 412 can be connected to the high-temperature flue gas pipe 50 by flange 4123 or welding. A casting material 41221 is provided inside the pipe, and an anchor claw 4125 is provided inside the casting material 41221. The setting of the anchor claw 4125 makes the casting material 41221 more stable.

[0065] like Figure 3 As shown, the interface pipe 4122 is in the form of a sleeve, and the interface pipe 4122 includes an outer sleeve 4124 and an inner sleeve 4126. The outer sleeve 4124 is sleeved on the outside of the inner sleeve 4126, and the inner sleeve 4126 is connected to the high-temperature flue gas pipe 50. The outer sleeve 4124 and the inner sleeve 4126 are made of metal such as stainless steel. The inner wall of the inner sleeve 4126 is lined with castable to prevent the high-temperature gas in the high-temperature flue gas pipe 50 from baking the metal.

[0066] Specifically, the outer sleeve 4124 and the inner sleeve 4126 are connected via a first flange 4123, and the inner sleeve 4126 is connected to the pipe of the air inlet section 41 via a second flange 4127. One end of the outer sleeve 4124 is connected to the outer wall of the high-temperature flue gas duct 50 by welding.

[0067] The outer sleeve 4124 is used to isolate heat to prevent people from being scalded, and it can also protect the inner sleeve 4126 to prevent the inner sleeve 4126 from being damaged.

[0068] It should be noted that the first air introduction duct 411 may also be directly connected to the high-temperature flue gas duct 50 via a flange or welding.

[0069] In some embodiments of the present application, the interface pipe 4122 is connected to the air outlet end of the first air introduction pipe 411 via a flange 4123 .

[0070] In the embodiment of the present application, the interface pipe 4122 is connected to the air outlet end of the first air introduction pipe 411 via a flange 4123 , making the connection between the interface pipe 4122 and the first air introduction pipe 411 more convenient and quick.

[0071] In some embodiments of the present application, the air introduction section 41 also includes a second main pipe, there are multiple second air introduction pipes 413, and the multiple second air introduction pipes 413 are connected to the second main pipe, and the multiple second air introduction pipes 413 are connected to the external air through the second main pipe.

[0072] In some embodiments of the present application, Figure 4 As shown, the CDQ system further includes an air heat exchange device 70, which includes an air heat exchange pipe. The air heat exchange pipe includes a bent section 71 and a straight section 72. One end of the bent section 71 is connected to the high-temperature flue gas duct 50, and the other end is connected to one end of the straight section 72. The other end of the straight section 72 is connected to the air outlet end of the air introduction section 41. The side wall of the high-temperature flue gas duct 50 is provided with a heat insulation layer 73. The position of the heat insulation layer 73 corresponds to that of the straight section 72. The outer wall of the straight section 72 is in contact with the outer wall of the high-temperature flue gas duct 50.

[0073] In this embodiment, air from the air intake section 41 enters the air heat exchange tube for preheating, reducing the impact between the introduced air and the flue gas in the high-temperature flue gas duct 50. Furthermore, the air heat exchange device is attached to the outside of the high-temperature flue gas duct 50, enabling heat exchange between the air in the air heat exchange device and the high-temperature flue gas duct 50, fully utilizing the heat of the high-temperature flue gas duct 50 and improving heat recovery. The provision of the thermal insulation layer prevents the high-temperature circulating gas in the high-temperature flue gas duct 50 from burning the air heat exchange tube.

[0074] It should be noted that the insulation layer can be castable or heat-resistant bricks, and the thickness of the insulation layer is relatively small, which facilitates the transfer of more heat to the air heat exchange device and increases the heat exchange effect between the circulating air and the high-temperature flue.

[0075] In some embodiments of the present application, the interior of the air heat exchange tube is provided with a plurality of staggered guide plates 74, which form a serpentine airflow channel. The plurality of guide plates 74 form a serpentine airflow channel within the air heat exchange tube, thereby improving heat exchange efficiency and stabilizing the flow.

[0076] In some embodiments of the present application, the interface pipe 4122 is connected to the air outlet end of the first air introduction pipe 411 via a flange 4123 .

[0077] In the embodiment of the present application, the interface pipe 4122 and the air outlet end of the first air inlet pipe 411 are detachably connected via the second flange 4127 , which facilitates installation and maintenance of the pipe.

[0078] In some embodiments of the present application, Figure 1 As shown, there are two primary cyclone dust collectors 20, and the two primary cyclone dust collectors 20 are arranged in parallel and symmetrically.

[0079] In the embodiment of the present application, there are two primary cyclone dust collectors 20, and the two primary cyclone dust collectors 20 are arranged in parallel. Therefore, the dry quenching furnace 10 is correspondingly provided with two air outlets, and the two air outlets are symmetrically arranged. The boiler 30 also has two air inlets, which are symmetrically arranged. The symmetrical arrangement makes the structure of the dry quenching system more reasonable.

[0080] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the scope of protection of the present application.

Claims

1. A dry quenching system, characterized in that: include: A dry quenching furnace (10), at least one primary cyclone dust collector (20), and a boiler (30), wherein the dry quenching furnace (10), at least one primary cyclone dust collector (20), and the boiler (30) are connected via a high-temperature flue gas duct (50); and a secondary dust collector (61), a circulating fan (62), a heat pipe heat exchanger (63), and an air introduction device (40); the dry quenching furnace (10) includes at least one air outlet, the air outlet (101) of the dry quenching furnace is connected to the air inlet (201) of the primary cyclone dust collector, and the air outlet of the primary cyclone dust collector (20) is connected to the air inlet (301) of the boiler; The air introduction device (40) includes at least two air introduction sections (41), the air introduction sections (41) are connected to the high-temperature flue gas duct (50), and the air introduction sections (41) are respectively arranged between the air outlet (101) of the dry quenching furnace and the air inlet (201) of the primary cyclone dust collector, and between the air outlet of the primary cyclone dust collector (20) and the air inlet (301) of the boiler. The air introduction sections (41) are used to introduce air into the high-temperature flue gas duct (50).

2. The dry quenching system according to claim 1, characterized in that: The air introduction device (40) includes at least one blower (42), and the air introduction section (41) includes at least one first air introduction pipe (411); The at least one blower (42) is in communication with an air inlet end of the at least one first air introduction pipe (411) for blowing air into the first air introduction pipe (411); the air outlet end of the first air introduction pipe (411) is in communication with the high-temperature flue gas pipe (50); The first air introduction pipe (411) is provided with a first valve (4111) and a regulating valve (4112). The first valve (4111) is used to control the on / off of the gas in the first air introduction pipe (411), and the regulating valve (4112) is used to adjust the gas flow in the first air introduction pipe (411).

3. The dry quenching system according to claim 2, characterized in that: The air introduction section (41) further includes at least one second air introduction pipe (413); The air inlet end of the second air introduction pipe (413) is in communication with the outside, the air outlet end of the second air introduction pipe (413) is in communication with the first air introduction pipe (411), and the air outlet end of the second air introduction pipe (413) is located between the first valve (4111) and the regulating valve (4112); The second air introduction pipe (413) is provided with a second valve (4131), and the second valve (4131) is used to control the on-off of the gas in the second air introduction pipe (413).

4. The dry quenching system according to claim 3, characterized in that: The air inlet end of the second air introduction pipe (413) is provided with a protective net, and the protective net is used to prevent external debris from being sucked into the second air introduction pipe (413).

5. The dry quenching system according to claim 3, characterized in that: The air introduction section (41) further includes a first main pipe (414) and a second main pipe; There are multiple first air introduction pipes (411), and the multiple first air introduction pipes (411) are connected to the first main pipe (414), and the multiple first air introduction pipes (411) are connected to the blower (42) through the first main pipe (414); There are multiple second air introduction pipes (413), and the multiple second air introduction pipes (413) are connected to the second main pipe. The multiple second air introduction pipes (413) are connected to the external air through the second main pipe.

6. The dry quenching system according to claim 2, characterized in that: The first air introduction pipe (411) is further provided with a flow detection device (4113) and a pressure measuring device (4114). The flow detection device (4113) is used to detect the gas flow in the first air introduction pipe (411), and the pressure measuring device (4114) is used to detect the pressure of the gas in the first air introduction pipe (411).

7. The dry quenching system according to claim 2, characterized in that: The air introduction section (41) further comprises a flue interface pipe assembly (412), the flue interface pipe assembly (412) comprising a nitrogen charging device (4121) and an interface pipe (4122), one end of the interface pipe (4122) being in communication with the air outlet end of the first air introduction pipe (411), and the other end being in communication with the high-temperature flue gas pipe (50), the nitrogen charging device (4121) being arranged on the interface pipe (4122).

8. The dry quenching system according to any one of claims 1 to 7, characterized in that: There are two primary cyclone dust collectors (20), and the two primary cyclone dust collectors (20) are symmetrically arranged.

9. The dry quenching system according to any one of claims 1 to 7, characterized in that: The dry quenching system further comprises an air heat exchange device (70), wherein the air heat exchange device (70) comprises an air heat exchange pipe, and the air heat exchange pipe comprises a bent section (71) and a straight section (72); One end of the bent section (71) is in communication with the high-temperature flue gas duct (50), and the other end is connected to one end of the straight section (72), and the other end of the straight section (72) is in communication with the air outlet end of the air inlet section (41); the outer wall of the straight section (72) is in contact with the outer wall of the high-temperature flue gas duct (50); A heat insulation layer (73) is provided on the side wall of the high-temperature flue gas duct (50), and the position of the heat insulation layer (73) corresponds to the straight-through section (72).

10. The dry quenching system according to claim 9, characterized in that: A plurality of staggered guide plates (74) are provided inside the air heat exchange tube, and the plurality of guide plates (74) form a serpentine airflow channel.

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