Dry quenching system

Abstract

The embodiment of the utility model provides a dry quenching system. The dry quenching system comprises a circulating pipeline; the circulating pipeline is sequentially communicated with a dry quenching furnace, a waste heat boiler, a filter type dust remover and a circulating fan; after being discharged from the dry quenching furnace, the circulating gas sequentially passes through the waste heat boiler, the filter type dust remover and the circulating fan, and the circulating gas discharged from the circulating fan flows into the dry quenching furnace; and the filter type dust remover is used for filtering dust in circulating gas in the circulating pipeline. According to the embodiment of the invention, the filter type dust remover is used for removing dust in the circulating gas, so that dust in the circulating gas entering the circulating fan is reduced, the abrasion degree of the dust to the circulating fan can be reduced, and the running stability of the dry quenching system is improved.

Description

Technical Field

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

[0002] With the development of coking industry technology, more and more coking projects require the use of dry quenching to cool red coke. Some regions require coke ovens to be designed with full dry quenching. In order to reduce coal costs during the production process, the ash content in coke has increased, especially the ash content of coke from ramming coke ovens and new clean energy coke ovens is higher than that of top-loading coke ovens. As a result, during the current dry quenching process, the circulating fan is easily worn by dust in the circulating gas, which leads to unstable operation of the dry quenching system. Utility Model Content

[0003] The purpose of the embodiment of the present application is to provide a dry coke quenching system to improve the stability of the operation of the dry coke quenching system. The specific technical solution is as follows:

[0004] An embodiment of the present application provides a dry quenching system, comprising: a circulation pipeline; the circulation pipeline is connected to a dry quenching furnace, a waste heat boiler, a filter-type dust collector, and a circulation fan in sequence; after the circulating gas is discharged from the dry quenching furnace, it passes through the waste heat boiler, the filter-type dust collector and the circulation fan in sequence, and the circulating gas discharged by the circulation fan flows into the dry quenching furnace; the filter-type dust collector is used to filter dust in the circulating gas in the circulation pipeline.

[0005] In some embodiments, the lower end of the filter-type dust collector is connected to an ash discharge device, and the ash discharge device is used to discharge ash in the filter-type dust collector.

[0006] In some embodiments, the filtering dust collector is a bag dust collector, the bag dust collector includes a filter bag, the filter bag can filter the dust, and the bag dust collector is arranged in compartments.

[0007] In some embodiments, the filter-type dust collector is a filter screen dust collector, which includes a filter screen capable of filtering the dust, and the filter screen dust collector is arranged in grids.

[0008] In some embodiments, the number of the filter dust collectors is three, and the three filter dust collectors are arranged at intervals along the direction of circulating gas flow. Along the direction of circulating gas flow, the height of the air inlet of the N+1th filter dust collector is greater than the height of the air outlet of the Nth filter dust collector, and N is greater than or equal to 1.

[0009] In some embodiments, the filter-type dust collector is a cartridge dust collector, and the cartridge dust collector is arranged in grids.

[0010] In some embodiments, the number of the cartridge dust collectors is two, and the two cartridge dust collectors are spaced apart along the direction of the circulating gas flow, and the height of the air inlet of the cartridge dust collector close to the circulating fan is greater than the height of the air outlet of the cartridge dust collector far from the circulating fan.

[0011] In some embodiments, the dry quenching system further includes an online cleaning device or an offline cleaning device, wherein the online cleaning device or the offline cleaning device is disposed on the filter-type dust collector, and the online cleaning device or the offline cleaning device is used to remove dust in the filter-type dust collector.

[0012] In some embodiments, the dry coke quenching system further includes a resistance detection device, which is capable of detecting a pressure difference between an air inlet of the filter-type dust collector and an air outlet of the filter-type dust collector.

[0013] In some embodiments, the dry quenching system further includes a heat exchanger and a primary dust collector, wherein the primary dust collector is disposed between the dry quenching furnace and the waste heat boiler, and the primary dust collector is communicated with the dry quenching furnace and the waste heat boiler, and the heat exchanger is disposed between the dry quenching furnace and the circulating fan, and the heat exchanger is communicated with the dry quenching furnace and the circulating fan.

[0014] The dry coke quenching system provided in the embodiment of the present application includes a dry quenching furnace, a waste heat boiler, a filter-type dust collector, and a circulating fan. After the circulating gas is discharged from the dry quenching furnace, it enters the waste heat boiler. The waste heat boiler can absorb the heat of the circulating gas, generate steam, and use the steam to generate electricity. After the circulating gas is discharged from the waste heat boiler, the circulating gas is dedusted by the filter-type dust collector, so the dust in the circulating gas entering the circulating fan is greatly reduced, thereby reducing the degree of wear of the circulating fan by the dust, thereby improving the stability of the operation of the dry coke quenching system.

[0015] 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

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0017] Figure 1 A schematic diagram of a coke dry quenching system provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of a filter dust collector in a coke dry quenching system provided in an embodiment of the present application;

[0019] Figure 3 Schematic diagram of a cartridge dust collector in a dry coke quenching system provided in an embodiment of the present application.

[0020] Reference numerals:

[0021] Circulation duct 10; first section 11; second section 12; dry quenching furnace 20; waste heat boiler 30; filter dust collector 40; flange 401; filter screen 421; shell 43; ash bin 44; side wall 441; vibrator 442; first filter screen dust collector 451; second filter screen dust collector 452; third filter screen dust collector 453; first filter cartridge dust collector 461; second filter cartridge dust collector 462; circulation fan 50; ash unloading device 60; online dust cleaning device 71; offline dust cleaning device 72; heat exchanger 81; primary dust collector 82; circulation gas flow direction X. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field based on the present application belong to the scope of protection of the present application.

[0023] The present application embodiment provides a coke dry quenching system, such as Figure 1 As shown, the dry quenching system includes: a circulation pipeline 10; the circulation pipeline 10 is connected to the dry quenching furnace 20, the waste heat boiler 30, the filter dust collector 40, and the circulation fan 50 in sequence; after the circulating gas is discharged from the dry quenching furnace 20, it passes through the waste heat boiler 30, the filter dust collector 40 and the circulation fan 50 in sequence, and the circulating gas discharged by the circulation fan 50 flows into the dry quenching furnace 20; the filter dust collector 40 is used to filter dust in the circulating gas in the circulation pipeline 10.

[0024] In the embodiment of the present application, the dry coke quenching system includes a dry quenching furnace 20, a waste heat boiler 30, a filter-type dust collector 40, and a circulating fan 50. After the circulating gas is discharged from the dry quenching furnace 20, it enters the waste heat boiler 30. The waste heat boiler 30 can absorb the heat of the circulating gas, generate steam, and use the steam to generate electricity. After the circulating gas is discharged from the waste heat boiler 30, the circulating gas is dedusted by the filter-type dust collector 40, so the dust in the circulating gas entering the circulating fan 50 is greatly reduced, thereby reducing the degree of wear of the circulating fan 50 by the dust, thereby improving the stability of the operation of the dry coke quenching system.

[0025] It should be noted that the filter-type dust collector is a high-efficiency dust removal device that allows dust-containing gas to pass through filter materials to separate solid dust from the gas. Compared with the gravity dust collector, the filter-type dust collector has a better dust removal effect and improves the filtering efficiency, which greatly reduces the dust entering the circulating fan 50, thereby reducing the degree of wear of the circulating fan 50 by the dust, thereby improving the stability of the dry quenching system operation.

[0026] It should be noted that the circulation duct 10 includes a plurality of sub-ducts, and the CDQ furnace 20, the waste heat boiler 30, the filter-type dust collector 40, and the circulation fan 50 are connected through the sub-ducts.

[0027] In some embodiments of the present application, the lower end of the filter dust collector 40 is connected to an ash discharge device 60 , and the ash discharge device 60 is used to discharge the ash in the filter dust collector 40 .

[0028] In the present application embodiment, Figure 1 As shown, the outlet of the filter dust collector 40 is connected to the inlet of the dust discharge device 60 , so that the dust in the filter dust collector 40 can be discharged in time through the dust discharge device 60 to prevent dust from accumulating in the filter dust collector 40 .

[0029] In some embodiments of the present application, Figure 1 As shown, the filter-type dust collector 40 is a bag dust collector, which includes filter bags (not shown), which can filter the dust, and the bag dust collector is arranged in grids.

[0030] In the embodiment of the present application, the bag filter is a dry dust filtering device. It is suitable for capturing fine, dry, non-fibrous dust. The bag filter includes a housing and a filter bag arranged in the housing. The filter bag is made of textile filter cloth or non-textile felt. The circulating gas containing dust is filtered by the filtering effect of the fiber fabric. When the circulating gas containing dust enters the bag filter, the dust with large particles and high specific gravity settles down due to the effect of gravity and falls into the ash hopper. When the circulating gas containing finer dust passes through the filter material of the filter bag, the dust is retained, so that the circulating gas is purified, and the dust content of the circulating gas is reduced when it enters the circulating fan 50, reducing the wear of the circulating fan 50 by dust, thereby improving the stability of the dry coke quenching system. The bag filter is arranged in compartments, and the bag filter can be cleaned in compartments, making the cleaning process of the bag filter more accurate and quick.

[0031] In some embodiments of the present application, Figure 2 As shown, the filter-type dust collector 40 is a filter screen dust collector, which includes a filter screen 421, which can filter the dust, and the filter screen dust collector is arranged in grids.

[0032] In the embodiment of the present application, the filter dust collector includes a housing 43, an ash bin 44, and a filter 421. The lower end of the housing 43 is connected to the upper end of the ash bin 44. The filter 421 is arranged in the housing, and the filter 421 is perpendicular to the flow direction of the circulating gas in the housing. The number of filters 421 can be set according to actual needs. Multiple filters 421 can be arranged at intervals along the flow direction of the circulating gas in the housing. The installation of the filter 421 is more convenient and has a good dust removal effect. It can further reduce the dust in the circulating gas before entering the circulating fan 50, thereby improving the stability of the dry quenching system.

[0033] Specifically, a vibrator 442 can be provided on the side wall 441 of the ash bin 44. Through the vibration of the vibrator 442, the dust accumulated on the side wall 441 of the ash bin 44 can continue to fall and then be discharged from the bottom of the ash bin 44, thereby preventing the dust from accumulating on the side wall 441 of the ash bin 44 and causing the ash bin to collapse.

[0034] It should be noted that if Figure 2 As shown, the filter-type dust collector 40 is connected to the circulation pipe 10 via a flange 401. The flange 401 connection can improve the sealing performance of the connection between the filter-type dust collector 40 and the circulation pipe 10, and can also make the installation of the filter-type dust collector 40 more convenient and quick.

[0035] In some embodiments of the present application, Figure 2 As shown, the number of filter dust collectors is three, and the three filter dust collectors are arranged at intervals along the direction of circulating gas flow. Along the direction of circulating gas flow, the height of the air inlet of the N+1th filter dust collector is greater than the height of the air outlet of the Nth filter dust collector, and N is greater than or equal to 1.

[0036] In the embodiment of the present application, three filter dust collectors are arranged at intervals along the direction of circulating gas flow, which can improve the filtering effect of dust in the circulating gas. Along the circulating gas flow direction X, the height of the air inlet of the N+1th filter dust collector is greater than the height of the air outlet of the Nth filter dust collector. Along the circulating gas flow direction, three filter dust collectors are defined as the first filter dust collector 451, the second filter dust collector 452 and the third filter dust collector 453. Along the circulating gas flow direction X, the height of the air inlet of the second filter dust collector 452 is greater than the height of the air outlet of the first filter dust collector 451, and the height of the air inlet of the third filter dust collector 453 is greater than the height of the air outlet of the second filter dust collector 452. Through the above arrangement, when the circulating gas is discharged from the first filter dust collector 451 to the second filter dust collector 452 and from the second filter dust collector 452 to the third filter dust collector 453, the gas shows an upward trend, which can make the dust in the circulating gas fall by gravity and filter a part of the dust, thereby further improving the dust filtering effect, and further reducing the dust content in the circulating gas entering the circulating fan 50, thereby improving the stability of the dry quenching system operation.

[0037] Specifically, Figure 2 As shown, along the circulating gas flow direction X, the circulating duct 10 includes a first section 11 and a second section 12, the first section 11 is arranged between the first filter dust collector 451 and the second filter dust collector 452, and the first section 11 is connected to the first filter dust collector 451 and the second filter dust collector 452; the second section 12 is arranged between the second filter dust collector 452 and the third filter dust collector 453, and the second section 12 is connected to the second filter dust collector 452 and the third filter dust collector 453.

[0038] In some embodiments of the present application, Figure 3 As shown, the filter-type dust collector 40 is a cartridge dust collector, and the cartridge dust collector is arranged in grids.

[0039] In the embodiment of the present application, the filter cartridge dust collector is composed of a filter cartridge as a filter element. The filter cartridge dust collector can be divided into oblique insertion type, side mounting type, hanging type, and top mounting type according to the installation method. The installation method of the filter cartridge dust collector in the embodiment of the present application can be oblique insertion type.

[0040] In some embodiments of the present application, there are two cartridge dust collectors, and the two cartridge dust collectors are spaced apart along the direction of circulating gas flow, and the height of the air inlet of the cartridge dust collector close to the circulating fan 50 is greater than the height of the air outlet of the cartridge dust collector far from the circulating fan 50.

[0041] In the embodiment of the present application, two filter cartridge dust collectors are arranged at intervals along the direction of the circulating gas flow, which can better filter more dust in the circulating gas, thereby reducing the dust content entering the circulating fan 50, thereby improving the stability of the dry coke quenching system. The height of the air inlet of the filter cartridge dust collector close to the circulating fan 50 is greater than the height of the air outlet of the filter cartridge dust collector far away from the circulating fan 50. Along the flow direction of the circulating gas, the two filter cartridge dust collectors are defined as the first filter cartridge dust collector 461 and the second filter cartridge dust collector 462. Through the above arrangement, when the circulating gas is discharged from the first filter cartridge dust collector 461 to the second filter cartridge dust collector 462, the gas shows an upward trend, which can make the dust in the circulating gas fall by gravity, filter a part of the dust, further improve the dust filtering effect, and further reduce the dust content in the circulating gas entering the circulating fan 50, thereby improving the stability of the dry coke quenching system.

[0042] In some embodiments of the present application, Figure 1 and Figure 2 As shown, the dry quenching system also includes an online cleaning device 71 or an offline cleaning device 72, which is arranged on the filter dust collector 40 and is used to remove dust in the filter dust collector 40.

[0043] In the embodiment of the present application, an online dust cleaning device 71 or an offline dust cleaning device 72 is provided on the filter dust collector 40 to prevent the filter bag from being blocked. Specifically, the online dust cleaning device 71 or the offline dust cleaning device 72 can clean the filter dust collector 40 by online blowing or offline blowing. Specifically, Figure 1 As shown, the online dust cleaning device 71 or the offline dust cleaning device 72 can be arranged at the top of the filter dust collector 40. The online dust cleaning device 71 or the offline dust cleaning device 72 can include a back-blowing air duct, the outlet of which is toward the filtering part of the filter dust collector 40. The online back-blowing is performed by setting a time to purge the filtering part of the filter dust collector 40; the offline back-blowing is performed based on the resistance in the filter dust collector 40 to determine whether to back-blow. When the resistance in the filter dust collector 40 is large, the back-blowing is disconnected and back-blowing is performed. When the filter dust collector 40 is arranged in grids, the online dust cleaning device 71 or the offline dust cleaning device 72 includes a plurality of back-blowing pipes, and each grid compartment has a corresponding back-blowing pipe to purge the grid compartment to prevent the filtering part of the filter dust collector 40 from being blocked.

[0044] When a bag filter is used, an online dust cleaning device 71 can be provided. The operation mode of the online dust cleaning device 71 can be continuous or intermittent. The online dust cleaning time can be set according to the pressure difference between the inlet and outlet of the filter dust collector 40 before and after dust removal. At the same time, an offline dust cleaning device 72 can also be provided, and the dust is cleaned by using an offline dust cleaning method, and the dust is cleaned intermittently according to a preset time.

[0045] It should be noted that either the online dust cleaning device 71 or the offline dust cleaning device 72 can be selected for setting, or both can be set at the same time.

[0046] In some embodiments of the present application, the dry coke quenching system further includes a resistance detection device, which can detect the pressure difference between the air inlet of the filter-type dust collector 40 and the air outlet of the filter-type dust collector 40 .

[0047] In the embodiment of the present application, the resistance detection device may include a first pressure detector (not shown) and a second pressure detector (not shown), the first pressure detector is provided at the inlet of the filter dust collector 40, and the second pressure detector is provided at the outlet of the filter dust collector 40. By detecting the pressure at the inlet and outlet of the filter dust collector 40, the pressure difference at the inlet and outlet of the filter dust collector 40 can be obtained. By detecting the pressure difference at the inlet and outlet of the filter dust collector 40, the clogging condition of the filter part in the filter dust collector 40 can be understood, and then timely maintenance or replacement can be performed. According to the pressure difference at the inlet and outlet of the filter dust collector 40, the working state of the online cleaning device or the offline cleaning device is controlled.

[0048] In some embodiments of the present application, Figure 1 As shown, the dry quenching system also includes a heat exchanger 81 and a primary dust collector 82. The primary dust collector 82 is arranged between the dry quenching furnace 20 and the waste heat boiler 30, and the primary dust collector 82 is connected to the dry quenching furnace 20 and the waste heat boiler 30. The heat exchanger 81 is arranged between the dry quenching furnace 20 and the circulating fan 50, and the heat exchanger 81 is connected to the dry quenching furnace 20 and the circulating fan 50.

[0049] In the embodiment of the present application, the temperature of the circulating gas coming out of the annular channel of the dry quenching furnace 20 is between 900 and 980°C, and contains a large amount of coke dust. In order to reduce the impact of high-temperature coke dust on the entire dry quenching equipment, a primary dust collector 82 is used to remove the coarse coke powder contained in the circulating gas to reduce the wear of the dust on the waste heat boiler 30. After being discharged by the circulating fan 50, the circulating gas enters the heat exchanger 81, and the heat exchanger 81 can further cool the circulating gas to better cool the coke in the dry quenching furnace.

[0050] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A coke dry quenching system, characterized in that: include: Circulation pipeline (10); The circulation pipeline (10) is sequentially connected to a dry quenching furnace (20), a waste heat boiler (30), a filter-type dust collector (40), and a circulation fan (50); after the circulating gas is discharged from the dry quenching furnace (20), it passes through the waste heat boiler (30), the filter-type dust collector (40), and the circulation fan (50) in sequence, and the circulating gas discharged by the circulation fan (50) flows into the dry quenching furnace (20); The filter dust collector (40) is used to filter dust in the circulating gas in the circulating duct (10); the filter dust collector (40) is a filter dust collector; the filter dust collector comprises a housing (42), an ash bin (44), and a filter (421); the filter (421) is arranged in the housing; the filter (421) is capable of filtering the dust; and the filter dust collector is arranged in grids; The number of the filter dust collectors is three, and the three filter dust collectors are arranged at intervals along the direction of the circulating gas flow. Along the direction of the circulating gas flow, the height of the air inlet of the N+1th filter dust collector is greater than the height of the air outlet of the Nth filter dust collector, and N is greater than or equal to 1; A vibrator (442) is arranged on the side wall (441) of the ash bin (44), and the dust accumulated on the side wall (441) of the ash bin (44) can be made to fall down and then be discharged from the bottom of the ash bin (44) through the vibration of the vibrator (442).

2. The dry coke quenching system according to claim 1, characterized in that: The lower end of the filter-type dust collector (40) is connected to an ash discharge device (60), and the ash discharge device (60) is used to discharge ash in the filter-type dust collector (40).

3. The dry coke quenching system according to claim 1, characterized in that: The dry quenching system further comprises an online cleaning device (71) or an offline cleaning device (72), wherein the online cleaning device (71) or the offline cleaning device (72) is arranged on the filter-type dust collector (40), and the online cleaning device (71) or the offline cleaning device (72) is used to remove dust in the filter-type dust collector (40).

4. The dry coke quenching system according to claim 1, characterized in that: The dry coke quenching system further comprises a resistance detection device, wherein the resistance detection device is capable of detecting a pressure difference between an air inlet of the filter-type dust collector (40) and an air outlet of the filter-type dust collector (40).

5. The dry coke quenching system according to any one of claims 1 to 4, characterized in that: The dry quenching system further comprises a heat exchanger (81) and a primary dust collector (82); the primary dust collector (82) is arranged between the dry quenching furnace (20) and the waste heat boiler (30), and the primary dust collector (82) is communicated with the dry quenching furnace (20) and the waste heat boiler (30); the heat exchanger (81) is arranged between the dry quenching furnace (20) and the circulating fan (50), and the heat exchanger (81) is communicated with the dry quenching furnace (20) and the circulating fan (50).

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