A dry quenching process system

Abstract

This application provides a dry quenching coke process system, relating to the field of dry quenching technology. It includes: a dry quenching furnace, two inlet pipes, an outlet pipe, and two waste heat boilers; the number of inlet pipes corresponds to the number of waste heat boilers; the flue gas inlet of each waste heat boiler is connected to the outlet of the dry quenching furnace via an inlet pipe, ensuring that the flue gas inlets of the two waste heat boilers are independent of each other; the flue gas outlet of each waste heat boiler is connected to the inlet of the dry quenching furnace via an outlet pipe; the flue gas produced by the dry quenching furnace during the dry quenching process flows evenly into each waste heat boiler along each inlet pipe, and the flue gas processing capacity of each waste heat boiler per unit time is 0.5-0.7 times the flue gas discharge capacity of the dry quenching furnace per unit time. Using this dry quenching coke process system can solve the problem of easy tube rupture in existing dry quenching coke process systems due to low-load operation; furthermore, even if a tube rupture occurs on one side of the dry quenching coke process system, it can still operate normally.

Description

Technical Field

[0001] This application relates to the field of dry quenching technology, and in particular to a dry quenching process system. Background Technology

[0002] In recent years, dry quenching technology has been widely used in coking enterprises. As an energy-saving and environmentally friendly technology, dry quenching produces more stable quality coke than wet quenching. Combined with the recovery of heat from red-hot coke to generate steam for external use or power generation, the economic benefits of dry quenching significantly improve the profitability of coking enterprises.

[0003] Therefore, the continuous, stable, and safe production of dry quenching systems is crucial for coking enterprises. In existing technologies, when using a full dry quenching configuration, a single coke oven typically has multiple dry quenching processes. The flue gas produced by the coke oven flows through the dry quenching furnace into a waste heat boiler, where it is cooled. In this full dry quenching configuration, the waste heat boiler operates at low to medium loads for extended periods, leading to leaks in the low-temperature heating surfaces and evaporation heating surfaces of the boiler and its surrounding pipes. This can cause the waste heat boiler tubes in the dry quenching system to rupture, resulting in the system's inability to operate normally and ultimately, a shutdown of dry quenching production. Utility Model Content

[0004] The purpose of this application is to provide a dry quenching coke process system to solve the problem of boiler tube rupture caused by low-load operation of the dry quenching furnace in existing dry quenching systems. The specific technical solution is as follows:

[0005] This application provides a dry quenching coke process system, including: a dry quenching furnace, two inlet pipes, an outlet pipe, and two waste heat boilers;

[0006] The flue gas inlet of each of the waste heat boilers is connected to the outlet of the dry quenching furnace through an air inlet pipe, so that the flue gas inlets of the two waste heat boilers are independent of each other.

[0007] The flue gas outlet of each of the waste heat boilers is connected to the air inlet of the dry quenching furnace through the air outlet pipe.

[0008] The flue gas produced by the dry quenching furnace during the dry quenching process flows into each of the waste heat boilers through each of the air inlet pipes. The flue gas processing capacity of each waste heat boiler per unit time is 0.5-0.7 times the flue gas discharge capacity of the dry quenching furnace per unit time.

[0009] In some embodiments of this application, the dry quenching furnace is provided with an annular air duct inside, and two partition walls are provided inside the annular air duct to divide the annular air duct into two mutually isolated air duct areas; each air duct area on the dry quenching furnace is provided with an air outlet.

[0010] Each of the air outlets of the dry quenching furnace is connected to the flue gas inlet of a waste heat boiler through the air inlet pipe, and the flue gas outlet of the waste heat boiler is connected to the air inlet of the dry quenching furnace through the air outlet pipe; the flue gas produced by the dry quenching furnace during the dry quenching process flows evenly into each of the air duct areas and is transported to the waste heat boiler connected to the air duct area through the air inlet pipe.

[0011] The dry quenching process system also includes a connecting pipe;

[0012] The air duct area and the air intake pipe constitute the first flue gas treatment section. Multiple first flue gas treatment sections are connected by the connecting pipe, which is used to transport the flue gas from one first flue gas treatment section to another.

[0013] In some embodiments of this application, the number of the connecting pipes is two;

[0014] Each of the connecting pipes has its two ends located on both sides of one of the partition walls and is connected to the two air duct areas. The connecting pipes are used to transport flue gas from one of the air duct areas to the other air duct area.

[0015] In some embodiments of this application, each of the air inlet pipes is provided with: a primary dust collector, a combustion chamber, and a flue gas venting device; the air duct area, the primary dust collector, the combustion chamber, the flue gas venting device, and the waste heat boiler are connected in sequence;

[0016] The primary dust collector is used to remove coke powder from the flue gas; the combustion chamber is used to burn the unburned portion of the flue gas; and the flue gas venting device is used to vent the flue gas when the pressure in the intake pipe is too high.

[0017] The air intake pipe is equipped with a first valve for controlling the flow of air between each air duct area and its corresponding waste heat boiler.

[0018] In some embodiments of this application, each of the air inlet pipes has a first air inlet section, and the two ends of each first air inlet section are respectively connected to the air outlet of the dry quenching furnace and the inlet of the primary dust collector;

[0019] The two first air intake sections are connected by the connecting pipe, which is used to transport the flue gas in one of the first air intake sections to the other first air intake section.

[0020] In some embodiments of this application, each of the air inlet pipes has a second air inlet section, and the two ends of each second air inlet section are respectively connected to the outlet of the primary dust collector and the flue gas inlet of the waste heat boiler;

[0021] The two second air intake sections are connected by the connecting pipe, which is used to transport the flue gas in one of the second air intake sections to the other second air intake section.

[0022] In some embodiments of this application, the number of the air outlet pipes is one;

[0023] The air outlet pipe includes two first air outlet sections and one second air outlet section;

[0024] The inlets of the two first air outlet sections are respectively connected to the flue gas outlets of the two waste heat boilers, the outlets of the two first air outlet sections are connected to the inlets of the second air outlet sections, and the outlets of the second air outlet sections are connected to the air inlet of the dry quenching furnace.

[0025] The second air outlet section is sequentially equipped with a secondary dust collector, a circulating fan, and a feedwater preheating device; the outlet of the waste heat boiler, the secondary dust collector, the circulating fan, the feedwater preheating device, and the air inlet of the dry quenching furnace are sequentially connected.

[0026] The secondary dust collector is used to remove coke powder from the flue gas; the circulating fan is used to draw the flue gas from the waste heat boiler to the dry quenching furnace; the feedwater preheating device is used to further cool the flue gas.

[0027] A second valve is provided on the first gas outlet section, and the second valve is used to control the flow of gas in the first gas outlet section.

[0028] In some embodiments of this application, the dry quenching furnace, the primary dust collector, the waste heat boiler, the secondary dust collector, and the feedwater preheating device have a height difference in the vertical plane;

[0029] Along the flue gas flow direction, the flue gas flows out of the dry quenching furnace, passes through the primary dust collector and the waste heat boiler, and flows out from the lower outlet of the waste heat boiler and then flows into the secondary dust collector and the feedwater preheating device in sequence. After flowing out of the feedwater preheating device, the flue gas flows upward to flow back into the dry quenching furnace.

[0030] In some embodiments of this application, the dry quenching furnace, the primary dust collector, the waste heat boiler, the secondary dust collector, and the feedwater preheating device are arranged in a ring in a horizontal plane;

[0031] Along the flue gas flow direction, the flue gas flows out of the dry quenching furnace, passes sequentially through the primary dust collector, the waste heat boiler, the secondary dust collector and the feedwater preheating device, and flows back into the dry quenching furnace.

[0032] In some embodiments of this application, the connecting pipe is provided with a connecting valve, which is used to regulate the flow rate of gas in the connecting pipe and / or the flow direction of gas.

[0033] Beneficial effects of the embodiments in this application:

[0034] This application provides a dry quenching coke process system.

[0035] After the flue gas discharged from the dry quenching furnace flows evenly into the two waste heat boilers, the amount of flue gas flowing into each waste heat boiler along the intake pipe is 50% of the amount of flue gas discharged from the dry quenching furnace. Since the flue gas processing capacity of each waste heat boiler per unit time is 0.5-0.7 times that of the flue gas discharged from the dry quenching furnace per unit time, each waste heat boiler can operate at a high load, thus effectively improving the tube rupture situation caused by the waste heat boiler operating at medium and low loads.

[0036] When a tube ruptures on one side of the dry quenching coke process system, the dry quenching coke process system does not need to be shut down. It is only necessary to appropriately reduce the dry quenching coke output and reduce the gas discharge per unit time of the dry quenching furnace so that the single waste heat boiler on the other side can operate normally, thereby enabling the dry quenching coke process system to continue production.

[0037] In other words, when the dry quenching process system is in full dry quenching operation, each waste heat boiler can achieve stable operation at medium and high loads, thereby avoiding the situation where the waste heat boiler in the dry quenching process system ruptures, causing the dry quenching process system to malfunction and resulting in a dry quenching shutdown.

[0038] Of course, implementing any product or method of this application does not necessarily require achieving all of the advantages described above at the same time. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained based on these drawings.

[0040] Figure 1 This is a first schematic diagram of the dry quenching process system provided in this application;

[0041] Figure 2 This is a second schematic diagram of the dry quenching process system provided in this application;

[0042] Figure 3 This is a third schematic diagram of the dry quenching process system provided in this application;

[0043] Figure 4A schematic diagram of the dry quenching process system provided in this application, which adopts a planar annular arrangement (only one side of the flue gas treatment system is shown);

[0044] Figure 5 The dry quenching process system provided in this application adopts a two-pronged vertical ring arrangement structural diagram (only the flue gas treatment system on one side is shown).

[0045] Figure label:

[0046] Dry quenching furnace 1, annular air duct 11, air duct area 111, partition wall 12, air outlet 13, air inlet 14;

[0047] Air intake pipe 21, first air intake section 211, second air intake section 212, air outlet pipe 22, first air outlet section 221, second air outlet section 222;

[0048] Waste heat boiler 3;

[0049] Connecting pipe 4, connecting valve 41;

[0050] Primary dust collector 51, combustion chamber 52, flue gas venting device 53, first valve 54, secondary dust collector 55, circulating fan 56, water preheating device 57, second valve 58, third valve 59;

[0051] 6. Steel frame; 7. Elevator. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art based on this application are within the scope of protection of this application.

[0053] In the existing technology, common dry quenching coke process systems are usually divided into two modes: dry quenching as the main process and wet quenching as a backup, and a fully dry quenching configuration.

[0054] If a dry quenching system is adopted as the primary method with wet quenching as a backup, a tube rupture in a single dry quenching boiler will halt dry quenching production and initiate wet quenching. Repair time after a dry quenching boiler tube rupture can range from several days to over a month, which is extremely detrimental to the company's environmental protection, energy conservation, and economic efficiency. Under a fully dry quenching configuration, assuming a coke oven's red-hot coke processing capacity of 240 t / h, two 240 t / h dry quenching systems should be used to achieve full dry quenching. During normal operation, the flue gas treatment system of the waste heat boiler in each dry quenching system will operate at a 50% load rate. If three 120 t / h dry quenching systems are used to achieve full dry quenching, the flue gas treatment system of the waste heat boiler in each dry quenching system will operate at a 67% load rate during normal operation.

[0055] However, when the waste heat boiler is operating at low to medium loads, the insufficient flow of flue gas into it leads to excessive cooling of the flue gas. When the temperature of sulfur compounds in the flue gas drops to the dew point, the sulfur compounds mix with moisture to form an acidic liquid that adheres to the metal surface, causing acid corrosion of the waste heat boiler and surrounding pipes. This can easily lead to boiler tube rupture, thus limiting the long-term safe and stable production of the dry quenching coke process system.

[0056] To address the problem of boiler tube rupture caused by low-load operation in existing dry quenching systems, this application provides a dry quenching coke process system, such as... Figures 1 to 3 As shown, Figure 1 This is a first schematic diagram of the dry quenching process system provided in this application; Figure 2 This is a second schematic diagram of the dry quenching process system provided in this application; Figure 3 This is a third schematic diagram of the dry quenching coke process system provided in this application. The dry quenching coke process system includes: a dry quenching furnace 1, two inlet pipes 21, an outlet pipe 22, and two waste heat boilers 3; the number of inlet pipes 21 corresponds to the number of waste heat boilers 3; the flue gas inlet of each waste heat boiler 3 is connected to the outlet 13 of the dry quenching furnace 1 through an inlet pipe 21, so that the flue gas inlets of the two waste heat boilers 3 are independent of each other; the flue gas outlet of each waste heat boiler 3 is connected to the inlet 14 of the dry quenching furnace 1 through the outlet pipe 22; the flue gas produced by the dry quenching furnace 1 during the dry quenching process flows into each waste heat boiler 3 along each inlet pipe 21, so that the flue gas can flow evenly into each waste heat boiler 3, and the flue gas processing capacity of each waste heat boiler 3 per unit time is 0.5-0.7 times the flue gas discharge capacity of the dry quenching furnace 1 per unit time.

[0057] In this embodiment, the two waste heat boilers 3 in the flue gas treatment system are independently configured at their flue gas inlets, allowing them to be connected in parallel. When the flue gas discharged from the dry quenching furnace 1 flows evenly into the two waste heat boilers 3, the amount of flue gas flowing into each waste heat boiler 3 along the inlet pipe 21 is 50% of the amount of flue gas discharged from the dry quenching furnace 1. Since the flue gas processing capacity of each waste heat boiler 3 per unit time is 0.5-0.7 times the flue gas discharge capacity of the dry quenching furnace 1 per unit time, each waste heat boiler 3 can operate under high load, effectively improving the situation of tube rupture caused by the waste heat boiler 3 operating at medium and low loads. Each waste heat boiler 3 can be selected as a high-temperature, high-pressure type or a medium-temperature, medium-pressure type. The flue gas processing capacity per unit time of the waste heat boiler 3 can be reduced by changing the size of the waste heat boiler 3 or the number of heat pipes within it during the manufacturing process. In other words, the flue gas processing capacity per unit time of the waste heat boiler 3 can be adjusted according to actual operating conditions by changing the size of the waste heat boiler 3 or the number of heat pipes within it. It should be noted that low load refers to less than 50% of the load.

[0058] If one of the waste heat boilers 3 in the dry quenching coke process system ruptures its tube, the dry quenching coke process system does not need to be shut down. It is only necessary to appropriately reduce the dry quenching coke output, thereby reducing the gas discharge of the dry quenching furnace 1 per unit time, so that the individual waste heat boiler 3 can operate normally, and the dry quenching coke process system can continue to produce.

[0059] In other words, when the dry quenching process system is in full dry quenching operation, each waste heat boiler 3 can achieve stable operation at medium and high loads, thereby avoiding the situation where the waste heat boiler 3 in the dry quenching process system ruptures, causing the dry quenching process system to malfunction and resulting in dry quenching production shutdown.

[0060] Of course, in actual production, the flue gas treatment capacity of waste heat boiler 3 per unit time can be adjusted to other multiples according to actual needs, as long as the dry quenching coke process system can still operate normally after a tube rupture accident.

[0061] In existing technologies, under a fully dry quenching configuration, a single dry quenching furnace is typically equipped with multiple flue gas treatment systems. When the waste heat boiler tubes of one of these flue gas treatment systems rupture, the flue gas in that system cannot be promptly transported to other systems. This causes the flue gas to gradually accumulate within the ruptured system, leading to a gradual increase in pressure and creating a safety hazard.

[0062] Based on this, in some implementations of this application, such as Figures 1 to 3As shown, the dry quenching furnace 1 has an annular air duct 11 inside, and two partition walls 12 are installed inside the annular air duct 11, dividing the annular air duct 11 into two mutually isolated air duct areas 111; each air duct area 111 of the dry quenching furnace 1 is provided with an air outlet 13; each air outlet 13 of the dry quenching furnace 1 is connected to the flue gas inlet of a waste heat boiler 3 through an air inlet pipe 21, and the flue gas outlet of the waste heat boiler 3 is connected to the air inlet 14 of the dry quenching furnace 1 through an air outlet pipe 22; the flue gas produced by the dry quenching furnace 1 during the dry quenching process flows evenly into each Within a duct area 111, the gas is transported to a waste heat boiler 3 connected to the duct area 111 via an intake pipe 21; the dry quenching process system also includes a connecting pipe 4; the duct area 111 and the intake pipe 21 are designated as the first flue gas treatment section, and multiple first flue gas treatment sections are connected by the connecting pipe 4, which is used to transport the flue gas from one of the first flue gas treatment sections to another; wherein, the sum of the flue gas treatment volume of each waste heat boiler 3 per unit time is not less than the flue gas discharge volume of the dry quenching furnace 1 per unit time.

[0063] In this embodiment, the same dry quenching furnace 1 is connected to two waste heat boilers 3, and the two first flue gas treatment sections are connected in parallel. When one of the waste heat boilers 3 and / or the surrounding air inlet pipe 21 ruptures, only the waste heat boiler 3 affected by the accident can be shut down, while the remaining waste heat boilers 3 continue to operate normally, thereby improving the stability of the dry quenching process system. The annular air duct 11 inside the dry quenching furnace 1 is divided into two air duct areas 111 by two partition walls 12. The flue gas generated by the dry quenching furnace 1 during the dry quenching process flows evenly into the two air duct areas 111, and the flue gas in each air duct area 111 is transported to the waste heat boiler 3 for heat treatment through the air inlet pipe 21. The sum of the flue gas treatment volume of each waste heat boiler 3 per unit time is not less than the flue gas discharge volume of the dry quenching furnace 1 per unit time, so that each waste heat boiler 3 can operate under high load.

[0064] Furthermore, the dry quenching coke process system includes a flue gas treatment system. The two waste heat boilers 3 within this system are independently configured, with their flue gas inlets connected in parallel. The flue gas treatment system can include two first flue gas treatment sections formed by the duct area 111 and the inlet pipe 21, and a second flue gas treatment section formed by the outlet pipe 22. Each set of first flue gas treatment sections is interconnected via a connecting pipe 4. When one of the waste heat boilers 3 experiences a tube rupture, the flue gas in the first flue gas treatment section connected to that boiler 3 can be transported to other first flue gas treatment sections via the connecting pipe 4. This prevents the gradual accumulation of flue gas in the affected first flue gas treatment section, thus reducing the safety hazard. Moreover, because the flue gas in the affected first flue gas treatment section flows into other first flue gas treatment sections through the connecting pipe, the flue gas is less likely to escape from the rupture location, thereby improving the safety of the maintenance process.

[0065] In some implementations of this application, such as Figures 1 to 3 As shown, each air intake pipe 21 is equipped with: a primary dust collector 51, a combustion chamber 52, and a flue gas venting device 53; the air duct area 111, the primary dust collector 51, the combustion chamber 52, the flue gas venting device 53, and the waste heat boiler 3 are connected in sequence; the primary dust collector 51 is used to remove coke powder from the flue gas; the combustion chamber 52 is used to burn the unburned part of the flue gas; the flue gas venting device 53 is used to vent the flue gas when the pressure in the air intake pipe 21 is too high; a first valve 54 is provided on the air intake pipe 21, and the first valve 54 is used to control the flow of air between each air duct area 111 and its corresponding waste heat boiler 3.

[0066] In this embodiment, on the first flue gas treatment section of the flue gas treatment system, a primary dust collector 51, a combustion chamber 52, and a flue gas venting device 53 are sequentially installed along the direction from the outlet 13 of the dry quenching furnace 1 to the flue gas inlet of the waste heat boiler 3, and are sequentially connected through the air inlet pipe 21.

[0067] In this design, the two outlets 13 of the dry quenching furnace 1 are arranged 180° opposite each other, and two enclosed partition walls 12 are respectively installed at 90° positions on both sides of one of the outlets 13. The primary dust collector 51 can be a gravity (inertial) dust collector or a cyclone separator to prevent the high-temperature flue gas carrying coke powder from scouring the furnace tubes of the waste heat boiler 3, thereby avoiding the preheating boiler 3 tube rupture caused by corrosion and scouring of the high-temperature heating surface of the waste heat boiler 3 by the high-temperature circulating gas. Furthermore, the flue gas processing capacity of each primary dust collector 51 per unit time is set to correspond to that of the waste heat boiler 3, which is 0.5-0.7 times the flue gas discharge capacity of the dry quenching furnace 1 per unit time. At the same time, the first gate valve 54 can be a high-temperature slide valve with an internal water-cooled or castable refractory material to cut off the inlet of the primary dust collector 51.

[0068] like Figure 1 and Figure 3 As shown, the first valve 54 can be installed before the inlet of the primary dust collector 51; as Figure 2 As shown, the first valve 54 can be installed after the outlet of the primary dust collector 51. The first valve 54 can be a high-temperature valve. The combustion chamber 52 can introduce air to further combustible gases in the flue gas to ensure the safety of the dry quenching process system. It can also introduce combustible gases, solids, and air for combustion to provide heat for the waste heat boiler 3. The flue gas venting device 53 can perform emergency discharge of flue gas in the flue gas treatment system when the pressure is too high, further ensuring the safety of the dry quenching process system.

[0069] The outer walls of the inlet pipe 21 and the outlet pipe 22 can be metal shells, and their interiors can be lined with castable refractory, refractory bricks, or water-cooled walls. The cross-sectional dimensions of the inlet pipe 21 and the outlet pipe 22 can be selected according to 0.5-0.7 times the flue gas discharge of the dry quenching furnace 1 per unit time. They can be circular or other cross-sectional shapes, such as square. If a non-circular flue is used, a baffle plate is installed inside the channel to distribute the airflow and reduce the wall effect between the gas and the wall surface in the irregularly shaped channel. Temperature and pressure measuring components can be installed on the inlet pipe 21 and the outlet pipe 22 to achieve balanced gas discharge from the two outlets 13 of the dry quenching furnace 1 and uniform heat exchange within the furnace. The temperature and pressure measuring components can also be used in conjunction with the outlet and inlet of the primary dust collector 51 and the second valve 58 located at the flue gas outlet of the waste heat boiler 3 to achieve normal operation when both waste heat boilers 3 are operating normally, or when one waste heat boiler 3 is operating normally while the other is shut down. To monitor the flue gas in the intake pipe 21 and the exhaust pipe 22.

[0070] In some embodiments, such as Figures 1 to 3 As shown, the two ends of the connecting pipe 4 are symmetrically positioned to connect with the first flue gas treatment section, ensuring that the pressure at both ends of the connecting pipe 4 is the same. Furthermore, the two gas outlets 13 on the dry quenching furnace 1 are also symmetrically positioned, ensuring that the pressure at the two gas outlets 13 of the dry quenching furnace 1 is equal. The connecting pipe 4 can be lined with refractory material or have a water-cooled wall, and the shell of the connecting pipe 4 can be made of high-temperature resistant steel plate.

[0071] In some implementations of this application, such as Figure 1 As shown, a connecting valve 41 is provided on the connecting pipe 4. The connecting valve 41 is used to regulate the flow rate of the gas in the connecting pipe 4 and / or the flow direction of the gas.

[0072] In this embodiment, a connecting valve 41 can be installed on the connecting pipe 4. When the dry quenching process system is operating normally, the connecting valve 41 is closed, allowing each first flue gas treatment section to be connected in parallel without interference. When a waste heat boiler in the dry quenching process system experiences a tube rupture, the connecting valve 41 is opened, allowing the flue gas in the faulty first flue gas treatment section to flow through the connecting pipe 4 into other first flue gas treatment sections.

[0073] Preferably, the connecting pipe 4 can be a circular cross-section pipe, but it can also be a pipe with other cross-sectional shapes, such as a square connecting pipe 4. Preferably, the cross-sectional area of ​​the connecting pipe 4 is the same as the cross-sectional area of ​​the annular air duct 11. The cross-sectional dimensions of the connecting pipe 4 can be selected according to 0.5-0.7 times the amount of flue gas discharged from the dry quenching furnace 1 per unit time. Preferably, the connecting valve 41 can be a valve with a regulating function, so that the connecting valve 41 can regulate the flow rate and flow direction of the gas while controlling the flue gas flow. Of course, ordinary valves can also be used in conjunction with a fan. Ordinary valves are only used to control the flow of flue gas on both sides of the connecting pipe 4, and the fan is used to regulate the flow rate and flow direction of the gas. No further limitations are imposed here.

[0074] In some implementations of this application, such as Figure 1 As shown, each air inlet pipe 21 has a first air inlet section 211, and the two ends of each first air inlet section 211 are respectively connected to the air outlet 13 of the dry quenching furnace 1 and the inlet of the primary dust collector 51; the two first air inlet sections 211 are connected by a connecting pipe 4, which is used to transport the flue gas in one of the first air inlet sections 211 to the other first air inlet section 211.

[0075] In this embodiment, in each first flue gas treatment section, the inlet pipe 21 located between the outlet 13 of the dry quenching furnace 1 and the inlet of the primary dust collector 51 serves as the first inlet section 211. The two first inlet sections 211 in the dry quenching coke process system are connected by a connecting pipe 4. Thus, when the waste heat boiler 3 in one of the first flue gas treatment sections ruptures, the flue gas on that side can flow into the other normally operating first flue gas treatment section through the connecting pipe 4, and sequentially pass through the primary dust collector and the combustion chamber in the normally operating first flue gas treatment section before flowing into the waste heat boiler 3 on the normal side.

[0076] When the connecting pipe 4 connects the first air inlet section 211 of the two first flue gas treatment sections, the first valve 54 can be set between one end of the connecting pipe 4 and the inlet of the primary dust collector 51, and the first valve 54 can be set close to the dry quenching furnace 1. In this way, the amount of flue gas in the inlet pipe 21 on the fault side can be reduced, thereby preventing the situation of excessive pressure in the inlet pipe 21 on the fault side.

[0077] Meanwhile, the operating status of the dry quenching coke process system can be changed through remote central control adjustment or on-site manual adjustment. Specifically, the dry quenching coke process system can be divided into two different operating conditions. The first operating condition is when the dry quenching coke process system is operating normally. At this time, the flue gas flows into the two waste heat boilers 3 through the two outlets 13 of the dry quenching furnace 1 and the two inlet pipes 21 respectively. The second operating condition is when one of the waste heat boilers 3 in the dry quenching coke process system ruptures. At this time, in the first flue gas treatment section on the normal side, the flue gas flows into the waste heat boiler 3 on that side through the outlet 13 and the inlet pipe 21; in the first flue gas treatment section on the faulty side, the flue gas flows into the inlet pipe 21 on the normal side through the connecting pipe, and then enters the waste heat boiler 3 on the normal side after passing through the primary dust collector 51 and the combustion chamber 52. The specific usage can be adjusted according to the production conditions to achieve continuous, stable and safe dry quenching coke production.

[0078] In some implementations of this application, such as Figure 2 As shown, each air inlet pipe 21 has a second air inlet section 212, and the two ends of each second air inlet section 212 are respectively connected to the outlet of the primary dust collector 51 and the flue gas inlet of the waste heat boiler 3; the two second air inlet sections 212 are connected by a connecting pipe 4, which is used to transport the flue gas in one of the second air inlet sections 212 to the other second air inlet section 212.

[0079] In this embodiment, in each first flue gas treatment section, the inlet pipe 21 located between the outlet of the primary dust collector 51 and the flue gas inlet of the waste heat boiler 3 serves as the second inlet section 212. The two second inlet sections 212 in the dry quenching process system are connected by a connecting pipe 4. Thus, when the waste heat boiler 3 in one of the first flue gas treatment sections ruptures, the flue gas on that side can undergo dust removal once in the primary dust collector 51 on the faulty side, and then flow through the connecting pipe 4 into the other normally operating first flue gas treatment section, and then into the waste heat boiler 3 in the normally operating first flue gas treatment section. In this embodiment, a first valve 54 can be installed between one end of the connecting pipe 4 and the waste heat boiler 3 to cut off the flue gas flow path in the event of a fault. See also... Figure 2 A third valve 59 can be installed at the inlet of the afterburner chamber 52. In this way, when a tube rupture occurs on one side of the dry quenching system, the third valve 59 on the faulty side is closed, allowing the flue gas from the faulty side to flow through the connecting pipe 4 into the afterburner chamber 52 on the normal side. At this time, the flue gas from both sides of the dry quenching system passes through the afterburner chamber 52 on the normal side for further combustion.

[0080] In some implementations of this application, such as Figure 3As shown, there are two connecting pipes 4; each connecting pipe 4 has two ends located on both sides of a partition wall 12 and is connected to two air duct areas 111. The connecting pipe 4 is used to transport the flue gas in one air duct area 111 to the other air duct area 111.

[0081] In this embodiment, the air duct regions 111 formed by the annular air duct 11 in the dry quenching furnace 1 are connected by connecting pipes 4, with each end of the connecting pipe 4 connected to the annular air duct 11 located on both sides of a partition wall. This arrangement, with two connecting pipes 4 located on opposite sides of the annular air duct 11, ensures more uniform pressure within the annular air duct 11. The connecting pipes 4 and the dry quenching furnace 1 are integrally formed and lined with refractory bricks. Thus, when the waste heat boiler 3 in one of the first flue gas treatment sections ruptures, the flue gas in that side's air duct region 111 can directly flow into the other air duct region 111 through the connecting pipes 4, and sequentially pass through the outlet 13 on the normal side, the primary dust collector 51, and the combustion chamber 52 before flowing into the waste heat boiler 3 on the normal side. A first valve 54 can be positioned between the outlet 13 of the dry quenching furnace 1 and the inlet of the primary dust collector 51, and is placed close to the dry quenching furnace 1. This reduces the amount of flue gas in the intake pipe 21 on the faulty side, thereby preventing excessive pressure in the intake pipe 21 on the faulty side.

[0082] In actual production, a connecting pipe can be formed between the two first flue gas treatment sections of the dry quenching coke process system by welding or stacking.

[0083] In some implementations of this application, such as Figures 1 to 3 As shown, there is one exhaust pipe 22, which includes two first exhaust sections 221 and one second exhaust section 222. The inlets of the two first exhaust sections 221 are respectively connected to the flue gas outlets of the two waste heat boilers 3, and the outlets of the two first exhaust sections 221 are connected to the inlets of the second exhaust section 222. The outlet of the second exhaust section 222 is connected to the air inlet 14 of the dry quenching furnace 1. A secondary dust collector 55, a circulating fan 56, and a water supply are sequentially installed on the second exhaust section 222. The preheating device 57; the outlet of the waste heat boiler 3, the secondary dust collector 55, the circulating fan 56, the feed water preheating device 57 and the air inlet 14 of the dry quenching furnace 1 are connected in sequence; the secondary dust collector 55 is used to remove coke powder from the flue gas; the circulating fan 56 is used to draw the flue gas from the waste heat boiler 3 to the dry quenching furnace 1; the feed water preheating device 57 is used to further cool the flue gas; a second valve 58 is provided on the first air outlet section 221, and the second valve 58 is used to control the opening and closing of the gas in the first air outlet section 221.

[0084] In this embodiment, in the second flue gas treatment section of the flue gas treatment system, along the direction from the flue gas outlet of the waste heat boiler 3 to the air inlet 14 of the dry quenching furnace 1, a secondary dust collector 55, a circulating fan 56, and a feedwater preheating device 57 are sequentially installed and connected sequentially through the exhaust pipe 22. The second valve 58 can be a gate valve installed in the low-temperature section at the flue gas outlet of the waste heat boiler 3 to promptly cut off the flue gas flow path in the event of a tube rupture in the waste heat boiler 3.

[0085] The secondary dust collector 55 can be a cyclone separator. Preferably, when the primary dust collector 51 is a gravity dust collector, the secondary dust collector 55 is usually a multi-tube cyclone separator. When the primary dust collector 51 is a cyclone separator, the secondary dust collector can be a single-tube cyclone separator or a multi-tube cyclone separator, or the secondary dust collector 55 can be omitted.

[0086] The circulating fan 56 can be a double-suction circulating fan, in which airflow is simultaneously drawn in axially from both sides of the impeller, accelerated by the impeller, and then discharged unidirectionally from the casing volute. The first outlet section 221 can be a three-way pipe, that is, the two ends of the first outlet section 221 are respectively connected to the two waste heat boilers 3, and the opening at the middle position of the first outlet section 221 is connected to the second outlet section 222.

[0087] Because the flue gas outlets of the two waste heat boilers 3 are combined and connected in series in the second flue gas treatment section, all the flue gas in the flue gas treatment system flows back into the dry quenching furnace 1 from the air inlet 14 through an outlet pipe 22. The flue gas treatment capacity of the secondary dust collector, circulating fan 56 and feedwater preheating device 57 per unit time can be the same as the flue gas discharge capacity of the dry quenching furnace 1 per unit time.

[0088] In some implementations of this application, such as Figure 4 As shown, Figure 4 The schematic diagram of the dry quenching coke process system provided in this application adopts a planar annular arrangement (only one side of the flue gas treatment system is shown). The dry quenching furnace 1, primary dust collector 51, waste heat boiler 3, secondary dust collector 55, and feedwater preheating device 57 are arranged in a ring in a horizontal plane; along the flue gas flow direction, the flue gas flows out of the dry quenching furnace 1, passes through the primary dust collector 51, waste heat boiler 3, secondary dust collector 55, and feedwater preheating device 57 in sequence, and flows back into the dry quenching furnace 1.

[0089] In this embodiment, the dry quenching process system adopts a planar ring arrangement. The flue gas flowing out of each waste heat boiler 3 is combined and connected in series after passing through the second valve 58, and flows into the second flue gas treatment section, flowing along the extension direction of the outlet pipe 22. Workers can move up and down on the dry quenching furnace 1 via the elevator 7 outside the furnace 1. The dry quenching process system is arranged in a ring in the horizontal direction, with a relatively small height difference in the vertical direction.

[0090] In some implementations of this application, such as Figure 5 As shown, Figure 5 The schematic diagram of the dry quenching process system provided in this application adopts a two-pronged, annular vertical arrangement (only one side of the flue gas treatment system is shown). The dry quenching furnace 1, primary dust collector 51, waste heat boiler 3, secondary dust collector 55, and feedwater preheating device 57 have a height difference in the vertical plane; along the flue gas flow direction, the flue gas flows out of the dry quenching furnace 1, passes through the primary dust collector 51 and the waste heat boiler 3, and flows out from the lower outlet of the waste heat boiler 3 before flowing into the secondary dust collector 55 and the feedwater preheating device 57 in sequence. After flowing out of the feedwater preheating device 57, the flue gas flows upward to flow back into the dry quenching furnace 1.

[0091] Specifically, the flue gas in the waste heat boiler 3 is discharged from the flue gas outlet at the lower end of the waste heat boiler 3, and then enters the lower part of the secondary dust collector 55. At this time, the flue gas flows from bottom to top. The small coke powder in the flue gas is removed by centrifugation. The flue gas is then discharged from the outlet at the upper end of the secondary dust collector 55 and enters the feedwater preheating device 57. After the flue gas is further cooled in the feedwater preheating device 57, it flows upward and finally flows back into the dry quenching furnace 1.

[0092] In this embodiment, the dry quenching process system adopts a two-pronged, annular vertical arrangement. The inlets between the two waste heat boilers 3 are set at 180°. The flue gas flowing out of each waste heat boiler 3 merges and connects in series after passing through the second valve 58, flowing into the second flue gas treatment section and flowing along the extension direction of the outlet pipe 22. The inlet and outlet of the secondary dust collector 55 are set at 180°. The secondary dust collector 55 can be set above or below the waste heat boiler 3 so that the center line of the secondary dust collector 55 coincides with the center line of the waste heat boiler 3. The circulating fan 56 can share the same foundation as the secondary dust collector 55, that is, the circulating fan 56 and the secondary dust collector 55 can be installed on the same supporting foundation. For example, the circulating fan 56 can be installed on the ground, and the secondary dust collector 55 can be supported by a steel frame, which sits on the ground foundation. The circulating fan 56 and the secondary dust collector 55 are set on the same side. The height of the feedwater preheating device 57 is lower than that of the dry quenching furnace 1 and the waste heat boiler 3. It can be installed in the area between the waste heat boiler 3 and the dry quenching furnace 1, or between the dry quenching furnace 1 and the circulating fan 56. The waste heat boiler 3, the secondary dust collector 55, and the circulating fan 56 can also be randomly arranged according to the actual scenario. This arrangement makes the circulating fan 56, the secondary dust collector 55, and the feedwater preheating device 57 in the dry quenching process system relatively compact in the horizontal direction, thereby saving the floor space of the dry quenching process system.

[0093] In both of the above arrangements, the two waste heat boilers 3 can be connected by an integral shared frame structure, meaning the two waste heat boilers 3 are mounted on the same steel frame 6, allowing them to be installed adjacent to each other. The two primary dust collectors 51 can also be connected by an integral shared frame structure, further reducing the footprint of the dry quenching coke process system. Alternatively, the two waste heat boilers 3 or the two primary dust collectors 51 can be installed independently, meaning the two waste heat boilers 3 or the two primary dust collectors 51 are each mounted on two separate steel frames 6.

[0094] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0095] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0096] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A dry quenching process system, characterized in that, include: Dry quenching furnace (1), two air inlet pipes (21), air outlet pipes (22) and two waste heat boilers (3); The flue gas inlet of each of the waste heat boilers (3) is connected to the outlet (13) of the dry quenching furnace (1) through an air inlet pipe (21) so that the flue gas inlets of the two waste heat boilers (3) are independent of each other. The flue gas outlet of each of the waste heat boilers (3) is connected to the air inlet (14) of the dry quenching furnace (1) through the air outlet pipe (22); The flue gas produced by the dry quenching furnace (1) during the dry quenching process flows into each of the waste heat boilers (3) through each of the air inlet pipes (21). The amount of flue gas processed by each waste heat boiler (3) per unit time is 0.5-0.7 times the amount of flue gas discharged by the dry quenching furnace (1) per unit time.

2. The dry quenching process system according to claim 1, characterized in that, The dry quenching furnace (1) is provided with an annular air duct (11), and two partition walls (12) are provided in the annular air duct (11) to divide the annular air duct (11) into two mutually isolated air duct areas (111); each air duct area (111) on the dry quenching furnace (1) is provided with an air outlet (13). Each of the air outlets (13) of the dry quenching furnace (1) is connected to the flue gas inlet of a waste heat boiler (3) through the air inlet pipe (21), and the flue gas outlet of the waste heat boiler (3) is connected to the air inlet (14) of the dry quenching furnace (1) through the air outlet pipe (22); the flue gas produced by the dry quenching furnace (1) during the dry quenching process flows evenly into each of the air duct areas (111) and is transported to the waste heat boiler (3) connected to the air duct area (111) through the air inlet pipe (21); The dry quenching process system also includes a connecting pipe (4); The air duct area (111) and the air intake pipe (21) are the first flue gas treatment sections. Multiple first flue gas treatment sections are connected by the connecting pipe (4). The connecting pipe (4) is used to transport the flue gas from one of the first flue gas treatment sections to another first flue gas treatment section.

3. The dry quenching process system according to claim 2, characterized in that, The number of the connecting pipes (4) is two; Each of the connecting pipes (4) has its two ends located on both sides of a partition wall (12) and is connected to two air duct areas (111). The connecting pipes (4) are used to transport the flue gas in one of the air duct areas (111) to the other air duct area (111).

4. The dry quenching process system according to claim 2, characterized in that, Each of the aforementioned air intake pipes (21) is provided with: a primary dust collector (51), a combustion chamber (52), and a flue gas venting device (53); the air duct area (111), the primary dust collector (51), the combustion chamber (52), the flue gas venting device (53), and the waste heat boiler (3) are connected in sequence; The primary dust collector (51) is used to remove coke powder from the flue gas; the combustion chamber (52) is used to burn the unburned part of the flue gas; the flue gas venting device (53) is used to vent the flue gas when the pressure in the intake pipe (21) is too high. A first valve (54) is provided on the air intake pipe (21) to control the flow of air between each air duct area (111) and the corresponding waste heat boiler (3).

5. The dry quenching process system according to claim 4, characterized in that, Each of the aforementioned air inlet pipes (21) has a first air inlet section (211), and the two ends of each first air inlet section (211) are respectively connected to the air outlet (13) of the dry quenching furnace (1) and the inlet of the primary dust collector (51); The two first air intake sections (211) are connected by the connecting pipe (4), which is used to transport the flue gas in one of the first air intake sections (211) to the other first air intake section (211).

6. The dry quenching process system according to claim 4, characterized in that, Each of the aforementioned air inlet pipes (21) has a second air inlet section (212), and the two ends of each second air inlet section (212) are respectively connected to the outlet of the primary dust collector (51) and the flue gas inlet of the waste heat boiler (3); The two second air intake sections (212) are connected by the connecting pipe (4), which is used to transport the flue gas in one of the second air intake sections (212) to the other second air intake section (212).

7. The dry quenching process system according to claim 4, characterized in that, The number of the air outlet pipes (22) is one; The air outlet pipe (22) includes two first air outlet sections (221) and one second air outlet section (222); The inlets of the two first air outlet sections (221) are respectively connected to the flue gas outlets of the two waste heat boilers (3), and the outlets of the two first air outlet sections (221) are connected to the inlets of the second air outlet sections (222). The outlet of the second air outlet section (222) is connected to the air inlet (14) of the dry quenching furnace (1). The second air outlet section (222) is sequentially equipped with a secondary dust collector (55), a circulating fan (56), and a water preheating device (57); the outlet of the waste heat boiler (3), the secondary dust collector (55), the circulating fan (56), the water preheating device (57) are sequentially connected to the air inlet (14) of the dry quenching furnace (1); The secondary dust collector (55) is used to remove coke powder from the flue gas; the circulating fan (56) is used to draw the flue gas from the waste heat boiler (3) to the dry quenching furnace (1); the feedwater preheating device (57) is used to further cool the flue gas. The first gas outlet section (221) is provided with a second valve (58), which is used to control the flow of gas in the first gas outlet section (221).

8. The dry quenching process system according to claim 7, characterized in that, The dry quenching furnace (1), the primary dust collector (51), the waste heat boiler (3), the secondary dust collector (55), and the feedwater preheating device (57) have a height difference in the vertical plane; Along the flue gas flow direction, the flue gas flows out from the dry quenching furnace (1), passes through the primary dust collector (51) and the waste heat boiler (3), and flows out from the lower outlet of the waste heat boiler (3) and then flows into the secondary dust collector (55) and the feed water preheating device (57) in sequence. After the flue gas flows out from the feed water preheating device (57), it flows upward to flow back into the dry quenching furnace (1).

9. The dry quenching process system according to claim 7, characterized in that, The dry quenching furnace (1), the primary dust collector (51), the waste heat boiler (3), the secondary dust collector (55), and the feedwater preheating device (57) are arranged in a ring in a horizontal plane; Along the flue gas flow direction, the flue gas flows out from the dry quenching furnace (1), passes sequentially through the primary dust collector (51), the waste heat boiler (3), the secondary dust collector (55) and the feedwater preheating device (57), and flows back into the dry quenching furnace (1).

10. The dry quenching process system according to any one of claims 2-9, characterized in that, The connecting pipe (4) is provided with a connecting valve (41), which is used to adjust the flow rate of the gas in the connecting pipe (4) and / or the flow direction of the gas.

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