Coke dry quenching primary dust removal cooling sleeve backwashing device

Abstract

The utility model discloses a dry quenching primary dust removal cooling sleeve backwashing device, and relates to the technical field of dry quenching processes. The device comprises a cooling sleeve, a circulating water input pipeline, a circulating water output pipeline, a water inlet main stop valve, a water inlet control valve, a water outlet main stop valve, a circulating water overline, an overline flow control valve, an overline pressure monitoring meter, a blow-down pipeline, a blow-down valve and a wastewater collection pool. The water inlet main stop valve and the water inlet control valve are both mounted on the circulating water input pipeline, the water outlet main stop valve is mounted on the circulating water output pipeline, and the input end of the sewage discharge pipeline is connected to the circulating water input pipeline between the water inlet main stop valve and the water inlet control valve; the input end of the circulating water crossover line is connected with the circulating water input pipeline, away from one end of the water inlet main stop valve, of the water inlet main stop valve, and the circulating water crossover line is connected to the circulating water output pipeline between the water outlet main stop valve and the output end of the cooling sleeve. By means of the arrangement, operation is easy and convenient, online backwashing can be achieved, and sewage can be collected in a centralized mode.

Description

Technical Field

[0001] This application relates to the field of dry quenching coke technology, and in particular to a backwashing device for a primary dust removal and cooling sleeve in dry quenching coke. Background Technology

[0002] Current dry quenching coke dust removal and coke powder cooling devices typically employ a multi-tube structure with shell-and-tube heat exchangers. The bottom of the cooling device features a water inlet manifold capable of absorbing thermal expansion. This manifold holds a certain amount of sludge and impurities, ensuring the cooling tube channels do not become clogged. Backwashing can be performed online during annual dry quenching maintenance. Backwashing is performed by closing the cooling tube inlet valve, opening the cooling tube outlet valve, and disassembling the lower floating manifold cleaning port. However, this backwashing method involves complex cleaning port disassembly, pollutes the platform environment with wastewater, cannot be performed online, relies on downtime maintenance, has low flushing efficiency, and requires significant manual labor. Therefore, it suffers from problems such as requiring disassembly of the cleaning port for backwashing, complex operation, wastewater overflow, and the limitation to annual maintenance. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a backwashing device for a primary dust removal and cooling jacket in dry quenching, which is easy to operate, can be backwashed online, and allows for centralized collection of wastewater.

[0004] This application provides a backwashing device for a primary dust removal cooling jacket in dry quenching coke, comprising: a cooling jacket, a circulating water input pipeline, a circulating water output pipeline, a main inlet shut-off valve, an inlet control valve, a main outlet shut-off valve, a circulating water cross-line, a cross-line flow control valve, a cross-line pressure monitoring gauge, a sewage discharge pipeline, a sewage discharge valve, and a wastewater collection tank.

[0005] The output end of the circulating water input pipeline is connected to the input end of the cooling jacket, and the input end of the circulating water output pipeline is connected to the output end of the cooling jacket. The main inlet shut-off valve and the inlet control valve are both installed on the circulating water input pipeline, with the main inlet shut-off valve positioned close to the input end of the cooling jacket. The main outlet shut-off valve is installed on the circulating water output pipeline. The input end of the sewage discharge pipeline is connected to the circulating water input pipeline between the main inlet shut-off valve and the inlet control valve. The sewage discharge valve is installed on the sewage discharge pipeline, and the output end of the sewage discharge pipeline is connected to the input end of the wastewater collection tank.

[0006] The input end of the circulating water crossover line is connected to the circulating water input pipeline at the end of the main inlet shut-off valve away from the main inlet shut-off valve. The output end of the circulating water crossover line is connected to the circulating water output pipeline between the main outlet shut-off valve and the output end of the cooling sleeve. The crossover line flow control valve and the crossover line pressure monitoring gauge are both installed on the circulating water crossover line.

[0007] According to some embodiments of this application, the backwashing device for the primary dust removal and cooling jacket of the dry quenching coke further includes a water outlet control valve, which is installed on the circulating water outlet pipeline between the output end of the circulating water cross-line and the output end of the cooling jacket.

[0008] According to some embodiments of this application, the dry quenching coke primary dust removal and cooling jacket backwashing device further includes a control mechanism, which is connected to the main inlet shut-off valve, the inlet control valve, the main outlet shut-off valve, the cross-line flow control valve, the cross-line pressure monitoring gauge, the drain valve, and the outlet control valve.

[0009] According to some embodiments of this application, the backwashing device for the primary dust removal and cooling sleeve of the dry quenching coke further includes a circulating water tank, the input end of the circulating water input pipeline is connected to the output end of the circulating water tank, and the output end of the circulating water output pipeline is connected to the input end of the circulating water tank.

[0010] According to some embodiments of this application, the backwashing device for the primary dust removal and cooling jacket of the dry quenching coke further includes a circulating pump, which is installed on the circulating water input pipeline between the circulating water pool and the input end of the circulating water cross-line.

[0011] According to some embodiments of this application, the sewage pipeline is a flexible discharge hose.

[0012] In this application, the normal cooling mode is as follows: the main inlet shut-off valve, inlet control valve, and main outlet shut-off valve are all open, while the cross-line flow control valve is closed. The water flow is: circulating water input pipeline → cooling jacket → circulating water output pipeline. In the backwashing mode, the inlet control valve and main outlet shut-off valve are closed, while the main inlet shut-off valve, drain valve, and cross-line flow control valve are opened. The water flow is: circulating water input pipeline → circulating water cross-line → circulating water output pipeline → cooling jacket → circulating water input pipeline → drain pipeline → wastewater collection tank. A cross-line pressure monitoring gauge is used to monitor the circulating water cross-line pressure in real time to ensure safe bypass operation. Simplified operation: Fast backwashing is achieved by switching valves instead of traditional disassembly and cleaning ports. Anti-pollution design: The drain pipeline and wastewater collection tank are integrated with the circulating water cross-line for targeted wastewater collection. Online maintenance: No shutdown is required; the flushing pressure is monitored in real time via the cross-line pressure monitoring gauge to ensure uninterrupted cooling. The water flow direction is reversed to flush away the coke powder deposited inside the cooling jacket, and sludge is discharged through the drain pipeline. This application is easy to operate, can be backwashed online, and allows for centralized collection of wastewater.

[0013] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0014] Additional aspects and advantages of this application will become apparent and readily understood in conjunction with the following description of the embodiments, in which:

[0015] Figure 1 This is a schematic diagram of the backwashing device for the primary dust removal and cooling sleeve of the dry quenching coke oven provided in an embodiment of this application.

[0016] Figure label:

[0017] Cooling jacket 100, circulating water inlet pipeline 110, main inlet shut-off valve 111, inlet control valve 112, circulating pump 113, circulating water outlet pipeline 120, main outlet shut-off valve 121, outlet control valve 122, circulating water cross-line 130, cross-line flow control valve 131, cross-line pressure monitoring gauge 132, sewage pipeline 140, sewage valve 141, wastewater collection tank 142, circulating water tank 150. Detailed Implementation

[0018] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0019] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0020] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0021] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0022] Current dry quenching coke dust removal and coke powder cooling devices typically employ a multi-tube structure with shell-and-tube heat exchangers. The bottom of the cooling device features a water inlet manifold capable of absorbing thermal expansion. This manifold holds a certain amount of sludge and impurities, ensuring the cooling tube channels do not become clogged. Backwashing can be performed online during annual dry quenching maintenance. Backwashing is performed by closing the cooling tube inlet valve, opening the cooling tube outlet valve, and disassembling the lower floating manifold cleaning port. However, this backwashing method involves complex cleaning port disassembly, pollutes the platform environment with wastewater, cannot be performed online, relies on downtime maintenance, has low flushing efficiency, and requires significant manual labor. Therefore, it suffers from problems such as requiring disassembly of the cleaning port for backwashing, complex operation, wastewater overflow, and the limitation to annual maintenance.

[0023] To address the aforementioned problems, this application proposes a backwashing device for a primary dust removal and cooling jacket in dry quenching coke. The embodiments of this application will be further described below with reference to the accompanying drawings.

[0024] Reference Figure 1 This application provides a backwashing device for a primary dust removal cooling jacket in dry quenching, comprising a cooling jacket 100, a circulating water inlet pipeline 110, a circulating water outlet pipeline 120, a main inlet shut-off valve 111, an inlet control valve 112, a main outlet shut-off valve 121, a circulating water crossover line 130, a crossover flow control valve 131, a crossover pressure monitoring gauge 132, a sewage discharge pipeline 140, a sewage discharge valve 141, and a wastewater collection tank 142. The outlet end of the circulating water inlet pipeline 110 is connected to the inlet end of the cooling jacket 100, and the inlet end of the circulating water outlet pipeline 120 is connected to the outlet end of the cooling jacket 100. The main inlet shut-off valve 111 and the inlet control valve 112 are both installed on the circulating water inlet pipeline 110, with the main inlet shut-off valve 111 close to the cooling jacket 100. The input end of the 0 is configured such that the main shut-off valve 121 is installed on the circulating water output pipeline 120, the input end of the sewage pipeline 140 is connected to the circulating water input pipeline 110 between the main shut-off valve 111 and the inlet control valve 112, the sewage valve 141 is installed on the sewage pipeline 140, and the output end of the sewage pipeline 140 is connected to the input end of the wastewater collection tank 142; the input end of the circulating water crossover 130 is connected to the circulating water input pipeline 110 at the end of the main shut-off valve 111 away from the main shut-off valve 111, the output end of the circulating water crossover 130 is connected to the circulating water output pipeline 120 between the main shut-off valve 121 and the output end of the cooling sleeve 100, and the crossover flow control valve 131 and the crossover pressure monitoring gauge 132 are both installed on the circulating water crossover 130.

[0025] It should be noted that, through the drain line 140 and the circulating water cross-line 130, the internal deposits of coke powder, scale, and other impurities can be backflushed and removed without disassembling the cooling jacket 100, thus preventing blockage or a decrease in heat transfer efficiency. During backflushing, the inlet control valve 112 and the main outlet shut-off valve 121 are closed, and the cross-line flow control valve 131 and the drain valve 141 are opened. The cross-line water flow is used to backflush the cooling jacket 100, and the dirt is discharged into the wastewater collection tank 142 through the drain line 140. The circulating water cross-line 130 allows the continuous operation of the circulating water system to be maintained during the maintenance or cleaning of the cooling jacket 100, thus preventing the dry quenching system from shutting down. The cross-line flow control valve 131 and the cross-line pressure monitoring gauge 132 can adjust the cross-line water flow and monitor the pressure to ensure the hydraulic balance between the main system and the cross-line.

[0026] It should be noted that the cooling jacket 100 is the core component of the high-temperature gas cooling system. It is used to indirectly cool the high-temperature circulating gas (about 800-950°C) after primary dust removal to the temperature range that subsequent equipment (such as waste heat boiler) can tolerate (usually reduced to about 200-300°C) through circulating water.

[0027] In some embodiments, the cooling jacket 100 is located in the high-temperature circulating gas pipeline between the outlet of the primary dust collector and the inlet of the waste heat boiler. Specifically, the cooling jacket 100 is connected in series with the gas outlet pipeline of the primary dust collector, adjacent to the inlet of the waste heat boiler. Associated equipment includes the primary dust collector (for separating coarse coke particles) upstream and the waste heat boiler (for recovering heat energy) downstream. The cooling jacket 100 is fixed horizontally or vertically to the gas pipeline support, ensuring an airtight connection with both the primary dust collector and the waste heat boiler, typically using flanges or welding. The cooling jacket 100 has a double-layered structure; the inner pipe carries high-temperature gas, and the jacket layer carries circulating water, requiring strict sealing to prevent gas-water cross-contamination.

[0028] It should be noted that circulating water enters the jacket layer of the cooling jacket 100 from the external water supply system via the main inlet shut-off valve 111 and the inlet control valve 112. After absorbing heat, the cooling water is discharged from the circulating water output pipeline 120 via the main outlet shut-off valve 121. The two ends of the circulating water crossover 130 are respectively connected to the circulating water input / output pipelines, bypassing the cooling jacket 100 to form a bypass. The backwashing device for the primary dust removal cooling jacket of the dry quenching coke in this application realizes the backwashing, operation mode switching and safety isolation of the cooling jacket 100 through modular pipeline design and valve control, ensuring the long-term stable operation of the dry quenching system under high temperature and dusty conditions.

[0029] In this application, under normal cooling mode: the main inlet shut-off valve 111, the inlet control valve 112, and the main outlet shut-off valve 121 are all open, while the cross-line flow control valve 131 is closed. The water flow is: circulating water input pipeline 110 → cooling jacket 100 → circulating water output pipeline 120. Under backwashing mode: the inlet control valve 112 and the main outlet shut-off valve 121 are closed, while the main inlet shut-off valve 111, the drain valve 141, and the cross-line flow control valve 131 are open. The water flow is: circulating water input pipeline 110 → circulating water cross-line 130 → circulating water output pipeline 120 → cooling jacket 100 → circulating water input pipeline 110 → The sewage discharge pipeline 140 leads to the wastewater collection tank 142. A cross-line pressure monitoring gauge 132 is used to monitor the pressure of the circulating water cross-line 130 in real time, ensuring safe bypass operation. Simplified operation: valve switching replaces the traditional disassembly and cleaning port, enabling rapid backwashing. Pollution prevention design: the sewage discharge pipeline 140, wastewater collection tank 142, and circulating water cross-line 130 are integrated for targeted wastewater collection. Online maintenance: no shutdown is required; the flushing pressure is monitored in real time via the cross-line pressure monitoring gauge 132, ensuring uninterrupted cooling. Reversing the water flow direction flushes away the coke powder deposited in the cooling sleeve 100, and sludge is discharged through the sewage discharge pipeline 140. This application is easy to operate, allows for online backwashing, and enables centralized wastewater collection.

[0030] Reference Figure 1 It is understandable that the backwashing device for the primary dust removal and cooling jacket of dry quenching coke also includes a water outlet control valve 122, which is installed on the circulating water output pipeline 120 between the output end of the circulating water cross-line 130 and the output end of the cooling jacket 100.

[0031] It should be noted that in both normal cooling mode and backwashing mode, the outlet water control valve 122 is in the open state. In backwashing mode, by synchronously adjusting the opening of the cross-line flow control valve 131 and the outlet water control valve 122, the water flow velocity entering the jacket layer of the cooling jacket 100 can be precisely controlled to avoid water hammer effect caused by excessive flow velocity or local scaling caused by excessive flow velocity.

[0032] It is understandable that the backwashing device for the primary dust removal and cooling jacket of the dry quenching coke also includes a control mechanism, which is connected to the main inlet shut-off valve 111, the inlet control valve 112, the main outlet shut-off valve 121, the cross-line flow control valve 131, the cross-line pressure monitoring gauge 132, the drain valve 141, and the outlet control valve 122.

[0033] It should be noted that the control mechanism automatically switches between normal operation mode, backwash mode, or cross-line emergency mode according to preset programs or external commands (such as temperature sensors or pressure thresholds): Normal cooling: Opens the main inlet shut-off valve 111, inlet control valve 112, main outlet shut-off valve 121, and outlet control valve 122; closes the cross-line flow control valve 131 and drain valve 141; Backwash: Closes the main inlet shut-off valve 111 and main outlet shut-off valve 121; opens the cross-line flow control valve 131 and drain valve 141; and adjusts the opening of the outlet control valve 122 accordingly. This effectively avoids malfunctions or delayed responses caused by traditional manual operation, improving operational accuracy and efficiency.

[0034] It should be noted that, based on the real-time data from the cross-line pressure monitoring gauge 132, the control mechanism dynamically adjusts the opening of the cross-line flow control valve 131 and the outlet water control valve 122 to ensure that the backwash water pressure is stable (e.g., maintained at 0.3-0.5 MPa), preventing excessive pressure from damaging the pipeline or insufficient pressure from causing ineffective flushing.

[0035] It should be noted that the control mechanism can be a programmable logic controller or a DCS control system, and this application embodiment does not limit it.

[0036] Reference Figure 1 It is understandable that the dry quenching coke primary dust removal cooling jacket backwashing device also includes a circulating water tank 150, the input end of the circulating water input pipeline 110 is connected to the output end of the circulating water tank 150, and the output end of the circulating water output pipeline 120 is connected to the input end of the circulating water tank 150.

[0037] Reference Figure 1 It is understandable that the backwashing device for the primary dust removal and cooling jacket of the dry quenching coke also includes a circulating pump 113, which is installed on the circulating water input pipeline 110 between the input end of the circulating water pool 150 and the circulating water cross-line 130.

[0038] In some embodiments, the control mechanism is also connected to the circulation pump 113.

[0039] It should be noted that the core function of the circulating water tank 150 is to achieve water resource recycling: by returning water from the circulating water output pipeline 120 to the tank, a closed-loop system is formed, significantly reducing fresh water consumption and wastewater discharge, thus improving environmental protection and economy. By adjusting the speed of the circulating pump 113 or the valves, the flushing intensity and time can be flexibly controlled to adapt to different operating conditions (such as different degrees of blockage or coke processing volumes). The circulating pump 113 provides stable power to ensure the pressure and flow required for backflushing, preventing a decrease in flushing effect due to insufficient pressure.

[0040] It is understandable that the sewage pipeline 140 is a flexible discharge hose.

[0041] It should be noted that the dry quenching system operates in a high-temperature environment. The cooling jacket 100 and the drain line 140 may expand and contract due to temperature changes. The elasticity of the flexible hose can absorb deformation stress, preventing deformation, cracking, or leakage at the joints of the rigid pipe caused by thermal stress. The flexible hose can also buffer vibration energy, reducing the impact on pipe connections and preventing bolt loosening or weld cracking. When it is necessary to clean blockages or replace parts, the flexible hose can be flexibly disassembled through quick couplings (such as clamps), shortening maintenance time and reducing downtime losses. The flexible hose is usually made of special materials (such as fluororubber or polytetrafluoroethylene lining) to withstand high-temperature sewage (which may contain coke powder and acidic / alkaline substances), delaying aging and extending service life. During backwashing, the drain line 140 may be subjected to instantaneous high pressure or flow fluctuations. The flexibility of the flexible hose can alleviate pressure shocks and prevent damage to the pipeline caused by sudden changes in system pressure. At the same time, the sewage medium contains coke powder particles. The smooth inner wall of the flexible hose and its ability to move with the fluid reduce the risk of particle deposition and blockage, making it particularly suitable for intermittent sewage discharge scenarios.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

[0044] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A dry quenching primary dedusting cooling jacket pipe backwash device, characterized in that, The dry quenching primary dedusting cooling jacket backwash device comprises a cooling jacket, a circulating water input pipeline, a circulating water output pipeline, a water inlet main shutoff valve, a water inlet control valve, a water outlet main shutoff valve, a circulating water cross line, a cross line flow control valve, a cross line pressure monitoring gauge, a blowdown pipeline, a blowdown valve and a waste water collection tank. An output end of the circulating water input pipeline is connected to an input end of the cooling jacket, an input end of the circulating water output pipeline is connected to an output end of the cooling jacket, the water inlet main shutoff valve and the water inlet control valve are both installed on the circulating water input pipeline, and the water inlet main shutoff valve is arranged close to the input end of the cooling jacket, the water outlet main shutoff valve is installed on the circulating water output pipeline, an input end of the blowdown pipeline is connected to the circulating water input pipeline between the water inlet main shutoff valve and the water inlet control valve, the blowdown valve is installed on the blowdown pipeline, and an output end of the blowdown pipeline is connected to an input end of the waste water collection tank. An input end of the circulating water cross line is connected to the circulating water input pipeline away from the water inlet main shutoff valve at one end of the water inlet main shutoff valve, an output end of the circulating water cross line is connected to the circulating water output pipeline between the water outlet main shutoff valve and the output end of the cooling jacket, and the cross line flow control valve and the cross line pressure monitoring gauge are both installed on the circulating water cross line. The dry quenching primary dedusting cooling jacket backwash device further comprises a water outlet control valve installed on the circulating water output pipeline between the output end of the circulating water cross line and the output end of the cooling jacket.

2. The dry quenching primary dedusting cooling jacket backwash device according to claim 1, characterized in that, The dry quenching primary dedusting cooling jacket backwash device further comprises a control mechanism connected to the water inlet main shutoff valve, the water inlet control valve, the water outlet main shutoff valve, the cross line flow control valve, the cross line pressure monitoring gauge, the blowdown valve and the water outlet control valve.

3. The dry quenching primary dedusting cooling jacket backwash device according to claim 2, characterized in that, The dry quenching primary dedusting cooling jacket backwash device further comprises a circulating water tank, an input end of the circulating water input pipeline is connected to an output end of the circulating water tank, and an output end of the circulating water output pipeline is connected to an input end of the circulating water tank.

4. The dry quenching primary dedusting cooling jacket backwash device according to claim 1, characterized in that, The dry quenching primary dedusting cooling jacket backwash device further comprises a circulating pump installed on the circulating water input pipeline between the circulating water tank and the input end of the circulating water cross line.

5. The dry quenching primary dedusting cooling jacket backwash device according to claim 4, characterized in that, The blowdown pipeline is a flexible discharge hose.

6. The dry quenching primary dedusting cooling jacket backwash device according to claim 1, characterized in that, ​

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