Dry quenching primary dust remover structure

Abstract

The utility model relates to a dry quenching primary dust remover structure which is characterized in that a layered dust removal device is arranged in a dust remover body and consists of parallel interlayers, small interlayer ash hoppers and interlayer ash discharge channels; an inlet dust removal channel is arranged between the dust remover inlet and the dust remover ash hopper, and an outlet dust removal channel is arranged between the dust remover ash hopper and the dust remover outlet; the parallel interlayer divides the inlet dedusting channel and the outlet dedusting channel into an upper layer and a lower layer; the middle part of the parallel interlayer is connected with an interlayer ash discharge channel through an interlayer small ash hopper; a bottom outlet of the interlayer ash discharge channel is communicated with an ash discharge port of the dust remover; according to the utility model, the dust removal efficiency of the primary dust remover is improved, and meanwhile, the dust removal convenience is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of coke dry quenching, in particular to a high-efficiency coke dry quenching primary dust collector structure. Background Art

[0002] Coke dry quenching technology is a coke quenching method that uses inert circulating gas to cool and lower the temperature of red coke. It is superior to wet coke quenching technology in terms of energy conservation, environmental protection, and improvement of coke quality, and is a very important production link in the current coking industry. In the coke dry quenching process, the inert circulating gas enters the coke dry quenching furnace to cool the coke. The high-temperature dust-containing flue gas mixed with a large amount of pulverized coke enters the boiler for heat exchange after being dust-removed by the primary dust collector, then is further dust-removed by the secondary dust collector, and finally is recycled back into the coke dry quenching furnace through the circulation fan.

[0003] The traditional coke dry quenching primary dust collector is a gravity dust collector, which separates the dust in the gas by reducing the gas flow velocity. It has the characteristics of simple structure and small resistance, but the dust removal efficiency is relatively low. In order to improve the dust removal efficiency, some primary dust collectors are provided with upper retaining walls to become inertial dust collectors. However, due to the long-term thermal expansion and gas erosion of the upper retaining walls, they are prone to deformation, shedding, or even collapse, affecting the dust removal effect and the discharge of pulverized coke below. The low dust removal efficiency of the primary dust collector will cause wear to the subsequent boiler equipment, affect the dust removal effect of the secondary dust collector, and further cause wear to the circulation fan, affecting the stable production of coke dry quenching.

[0004] In addition, the dust removal efficiency of the gravity dust collector is inversely proportional to the height of the dust collector. Therefore, some gravity dust collectors are provided with parallel partition plates to reduce the dust falling time and improve the dust removal efficiency. However, after the inside of the dust collector is stratified, it is difficult to clean the accumulated ash. Generally, it is necessary to open the dust collector for cleaning or regularly use a scraper for cleaning. The more stratified the dust collector is, the more difficult it is to clean the accumulated ash. Summary of the Invention

[0005] The utility model provides a coke dry quenching primary dust collector structure, which divides the internal dust removal channel of the primary dust collector into upper and lower layers by arranging parallel partition layers, small ash hoppers for partition layers, and ash discharge channels for partition layers in the middle of the internal dust removal channel of the primary dust collector, improving the dust removal efficiency of the primary dust collector while ensuring the convenience of ash discharge.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A primary dedusting device structure for coke dry quenching, including a dedusting device body. One end of the dedusting device body is the dedusting device inlet, and the other end is the dedusting device outlet. A dedusting ash hopper is arranged in the middle of the dedusting device body, and a dedusting ash discharge port is arranged at the bottom of the dedusting ash hopper. A layered dedusting device is arranged inside the dedusting device body, and the layered dedusting device is composed of parallel partitions, partition small ash hoppers and partition ash discharge channels. The area between the dedusting device inlet and the dedusting ash hopper is the inlet dedusting channel, and the area between the dedusting ash hopper and the dedusting device outlet is the outlet dedusting channel. The parallel partitions divide the inlet dedusting channel and the outlet dedusting channel into upper and lower layers. The middle part of the parallel partitions is connected to the partition ash discharge channels through the partition small ash hoppers, and the bottom outlet of the partition ash discharge channels is communicated with the dedusting ash discharge port. A support structure is arranged between the layered dedusting device and the dedusting device body, and the layered dedusting device is positioned and fixed through the support structure.

[0008] Further, the parallel partitions are composed of an inlet parallel partition and an outlet parallel partition. Along the height direction, the inlet parallel partition is arranged in the middle of the inlet dedusting channel, and the outlet parallel partition is arranged in the middle of the outlet dedusting channel. The distances between the outer ends of the inlet parallel partition and the dedusting device inlet and between the outer ends of the outlet parallel partition and the dedusting device outlet are both greater than 0.5 m.

[0009] Further, the inlet dedusting channel and the outlet dedusting channel are channels with equal cross-sections.

[0010] Further, the side wall inclination angle of the partition small ash hopper is not greater than the side wall inclination angle of the dedusting ash hopper, but greater than the stacking angle of pulverized coke.

[0011] Further, the number of the partition ash discharge channels is more than 2.

[0012] Further, along the transverse direction of the dedusting device body, a conical section is arranged at the top of the partition ash discharge channels, and the side wall inclination angle of the conical section is greater than the stacking angle of pulverized coke.

[0013] Further, the layered dedusting device is made of a high-temperature and corrosion-resistant metal plate with a thickness of more than 5 mm. The two sides of the parallel partitions are embedded in the lining bricks of the side walls of the dedusting device body. The support structure is composed of multiple support rods. One end of each support rod is fixedly connected to the layered dedusting device, and the other end is inserted into the lining bricks of the corresponding wall of the dedusting device body.

[0014] Further, the support rods are made of high-temperature and corrosion-resistant metal or are built with refractory bricks.

[0015] Further, in the layered dedusting device, the parallel partitions and the partition small ash hoppers are built with refractory bricks, and the partition ash discharge channels are made of high-temperature and corrosion-resistant metal plates. The refractory bricks forming the parallel partitions and the partition small ash hoppers are built in an arch structure or a multi-arch structure in an interlocking manner, and are supported by a brick wall below the arch foot bricks.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] (1) By arranging a parallel partition layer and a small ash hopper of the partition layer in the dust removal channel of the primary dust collector, the dust removal channel of the primary dust collector is divided into upper and lower layers, which is equivalent to reducing the height of the dust removal channel, shortening the dust falling time, and improving the dust removal efficiency of the primary dust collector.

[0018] (2) The arrangement of the small ash hopper of the partition layer causes the gas flow rate in the dust removal channel above the small ash hopper to suddenly decrease. Under the action of gravity, the dust is separated from the gas and settles into the interior of the small ash hopper. At the same time, when the dust-containing gas in the dust removal channel below the parallel partition layer flows through the small ash hopper, it will impact the side wall of the small ash hopper and change the gas flow direction. Under the action of gravity and inertia force, the separation of dust and gas is accelerated. Therefore, the arrangement of the small ash hopper of the partition layer can further improve the dust removal efficiency of the dust removal channels above and below the parallel partition layer.

[0019] (3) A closed ash discharge channel is arranged at the lower part of the small ash hopper of the partition layer, which can discharge the dust collected by the upper dust removal channel in real time without affecting the dust removal efficiency of the lower dust removal channel, solving the problems of difficult ash cleaning and inability to continuously produce after the dust collector is stratified in industry. Description of the Drawings

[0020] Figure 1 is a schematic diagram of the structure of a primary dedusting coke oven of the present utility model.

[0021] Figure 2 is Figure 1 the A-A cross-section in Figure 1 .

[0022] Figure 3 is Figure 1 the A-A cross-section in Figure 2 .

[0023] In the figure: 1. Dust collector body; 2. Dust collector inlet; 3. Dust collector outlet; 4. Dust collector ash hopper; 5. Dust collector ash discharge port; 6. Parallel partition layer; 7. Small ash hopper of the partition layer; 8. Partition layer ash discharge channel; 9. Support rod; 10. Arch structure; 11. Lining brick Detailed Embodiments

[0024] The following further describes the detailed embodiments of the present utility model in conjunction with the drawings:

[0025] As Figure 1 shown, a primary dedusting coke oven structure of the present utility model includes a dust collector body 1. One end of the dust collector body 1 is a dust collector inlet 2, and the other end is a dust collector outlet 3. A dust collector ash hopper 4 is provided in the middle of the dust collector body 1, and a dust collector ash discharge port 5 is provided at the bottom of the dust collector ash hopper 4.

[0026] The dust removal passage is between the dust collector inlet 2 and the dust collector outlet 3 of the primary dust collector, wherein the dust collector inlet 2 and the dust collector ash hopper 4 are the inlet dust removal passage, and the dust collector ash hopper 4 and the dust collector outlet 3 are the outlet dust removal passage. The utility model sets parallel partitions 6 in the dust removal passage, which are also divided into inlet parallel partitions and outlet parallel partitions. The parallel partitions 6 are provided with interlayer small ash hoppers 7 at positions corresponding to the dust collector ash hoppers 4, and the bottom of the interlayer small ash hoppers 7 is connected to the interlayer ash discharge passage 8, and the bottom opening of the interlayer ash discharge passage 8 is connected to the dust collector ash discharge port 5. The dust removal passage inside the primary dust collector is divided into upper and lower layers by the parallel partitions 6, which reduces the height of the dust removal passage in disguise, reduces the dust falling time, and thus improves the dust removal efficiency.

[0027] Preferably, the parallel partition 6 of the utility model is arranged in the middle position of the dust removal channel in the height direction, so that the cross-sectional areas of the upper dust removal channel and the lower dust removal channel are similar. The two ends of the parallel partition 6 are at least 0.5m away from the corresponding dust collector inlet 2 and dust collector outlet 3. The coke collected in the upper dust removal channel is collected through the partition small ash hopper 7, and then sealed and discharged to the dust collector ash discharge port 5 through the partition ash discharge channel 8; the dust collected in the lower dust removal channel is collected through the dust collector ash hopper 4, and then discharged through the dust collector ash discharge port 5 together with the dust collected in the upper layer.

[0028] The setting of the interlayer small ash hopper 7 causes the gas flow rate of the upper dust removal channel to suddenly decrease, and the dust is separated from the gas under the action of gravity, and settles inside the interlayer small ash hopper 7, and is discharged through the interlayer ash discharge channel 8. At the same time, when the dust-laden gas in the lower dust removal channel flows through the interlayer small ash hopper 7, it will collide with the side wall of the interlayer small ash hopper 7 and change the direction of the airflow, and accelerate the separation of dust and gas under the action of gravity and inertial force. Therefore, the setting of the interlayer small ash hopper 7 can further improve the dust removal efficiency of the upper and lower dust removal channels. In addition, the dust collected in the upper dust removal channel is sealed and discharged through the interlayer ash discharge channel 8, which can prevent the airflow flowing through the lower dust removal channel from lifting the dust again and affecting the dust removal efficiency.

[0029] Preferably, the side wall inclination angle of the interlayer small ash hopper 7 of the utility model is not greater than the side wall inclination angle of the dust collector ash hopper 4, that is, the taper of the interlayer small ash hopper 7 is consistent with or smaller than the taper of the dust collector ash hopper 4, ensuring that when the airflow of the lower dust removal channel encounters the side wall of the interlayer small ash hopper 7 and changes direction to flow downward, the flow area gradually increases and the gas flow rate gradually decreases, thereby improving the dust removal efficiency. However, the inclination angle of the side wall of the interlayer small ash hopper 7 needs to be greater than the accumulation angle of the powdered coke, so that the dust collected by the partition wall small ash hopper 7 can automatically gather downward and enter the interlayer ash discharge channel 8.

[0030] Preferably, the top of the ash discharge channel 8 of the partition layer is conical (funnel-shaped) along the transverse direction of the primary dust collector, and the inclination angle of its side wall is greater than the stacking angle of the pulverized coke, facilitating the dust in the small ash hopper 7 of the partition layer to enter the ash discharge channel 8 of the partition layer; the number of the ash discharge channels 8 of the partition layer is not less than 2.

[0031] Preferably, the parallel partition layer 6, the small ash hopper 7 of the partition layer, and the ash discharge channel 8 of the partition layer can be made of metal materials such as heat-resistant stainless steel, and their thickness is not less than 5 mm. Since the temperature of the dust-containing gas in the primary dust collector is relatively high (up to 850 - 980 °C), when using metal materials, they must be high-temperature-resistant metals, such as heat-resistant stainless steels like SUS310 and SUS314. To ensure the structural stability of the parallel partition layer 6, both sides of the parallel partition layer 6 are respectively embedded in the lining bricks 11 on the corresponding sides of the dust collector body 1. Several support rods 9 can be arranged below the parallel partition layer 6, and the other ends of the support rods 9 are embedded in the lining bricks 11 of the dust collector body 1. The support rods 9 can be made of metal materials or can be built with refractory bricks.

[0032] Preferably, the parallel partition layer 6 and the small ash hopper 7 of the partition layer are built with refractory bricks. To ensure their structural stability, the refractory bricks of the parallel partition layer 6 and the small ash hopper 7 of the partition layer are all built with an arched structure 10, and the arch foot bricks are embedded in the lining bricks 11 of the dust collector body 1. The small ash hopper 7 of the partition layer is built with a stepped arch structure or a continuous arch structure, and is supported by a brick wall below the arch foot bricks.

[0033] To make the purpose, technical solution, and technical effects of the present invention clearer, the technical solutions in the embodiments of the present invention are now clearly and completely described. However, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Combining the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0034]

Embodiment 1

[0035] As Figure 1 、 Figure 2 shown, in this embodiment, a layered dust removal device is arranged in the middle of the dust collector body 1 of the primary dust collector, including a parallel partition layer 6, a small ash hopper 7 of the partition layer, and an ash discharge channel 8 of the partition layer. Each component is made of SUS310 heat-resistant stainless steel plate, and the thickness of the steel plate is 15 mm.

[0036] In this embodiment, as shown in the direction of the figure, the distance between the left end of the inlet parallel partition layer and the dust collector inlet 2 is 0.6 m, and the distance between the right end of the outlet parallel partition layer and the dust collector outlet 3 is 1 m. The inclination angle of the side wall of the small ash hopper 7 of the partition layer is 45°, the inclination angle of the side wall of the conical section at the top of the ash discharge channel 8 of the partition layer is 60°, and 2 ash discharge channels 8 of the partition layer are arranged.

[0037] In this embodiment, both sides of the parallel partition layer 6 and the small ash hopper 7 of the partition layer are embedded in the lining bricks 11 of the dust collector body 1. Three rows of support columns 9 are arranged on each side between the lower part of the layered dust removal device and the dust collector body 1, and the support columns 9 are made of refractory bricks.

[0038]

Embodiment 2

[0039] As Figure 1 、 Figure 3 shown, in this embodiment, a layered dust removal device is arranged in the middle of the dust collector body 1 of the primary dust collector, including a parallel partition layer 6, a small ash hopper 7 of the partition layer and a dust discharge channel 8 of the partition layer. Among them, both the parallel partition layer 6 and the small ash hopper 7 of the partition layer are made of Class A mullite bricks. The parallel partition layer 6 is built with an arch structure, and the small ash hopper 7 of the partition layer is built with a stepped arch structure. The arch foot bricks of all brick arch structures are embedded in the lining bricks 11 of the dust collector body 1.

[0040] In this embodiment, two dust discharge channels 8 of the partition layer are provided, and they are all made of SUS314 heat-resistant stainless steel; in order to achieve a better dust discharge effect, the top opening of the dust discharge channel 8 of the partition layer completely wraps the bottom opening of the small ash hopper 7 of the partition layer.

[0041] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A structure of a primary dedusting device for coke dry quenching, comprising a dedusting device body. One end of the dedusting device body is a dedusting device inlet, and the other end is a dedusting device outlet. A dedusting device ash hopper is arranged in the middle of the dedusting device body, and a dedusting device ash discharge port is arranged at the bottom of the dedusting device ash hopper; it is characterized in that, A layered dust removal device is provided inside the dust collector body. The layered dust removal device consists of parallel partitions, small ash hoppers for partitions, and ash discharge channels for partitions. Between the dust collector inlet and the dust collector ash hopper is an inlet dust removal channel, and between the dust collector ash hopper and the dust collector outlet is an outlet dust removal channel. The parallel partitions divide the inlet dust removal channel and the outlet dust removal channel into upper and lower layers. The middle of the parallel partitions is connected to the ash discharge channel for partitions through the small ash hoppers for partitions, and the bottom outlet of the ash discharge channel for partitions is communicated with the dust discharge port of the dust collector. A support structure is provided between the layered dust removal device and the dust collector body, and the layered dust removal device is positioned and fixed through the support structure.

2. The structure of a primary dedusting device for coke dry quenching according to claim 1, characterized in that, The parallel partitions consist of an inlet parallel partition and an outlet parallel partition. Along the height direction, the inlet parallel partition is arranged in the middle of the inlet dust removal channel, and the outlet parallel partition is arranged in the middle of the outlet dust removal channel. The distance between the outer end of the inlet parallel partition and the dust collector inlet and the distance between the outer end of the outlet parallel partition and the dust collector outlet are both greater than 0.5 m.

3. The structure of a primary deduster for coke dry quenching according to claim 1 or 2, characterized in that, The inlet dust removal channel and the outlet dust removal channel are channels with equal cross-sections.

4. The structure of a primary dedusting device for coke dry quenching according to claim 1, characterized in that, The side wall inclination angle of the small ash hopper for partitions is not greater than the side wall inclination angle of the dust collector ash hopper, but greater than the stacking angle of pulverized coke.

5. The structure of a primary deduster for coke dry quenching according to claim 1, characterized in that, The number of the ash discharge channels for partitions is more than 2.

6. The structure of a primary deduster for coke dry quenching according to claim 1 or 5, characterized in that Along the transverse direction of the dust collector body, a conical section is provided at the top of the ash discharge channel for partitions, and the side wall inclination angle of the conical section is greater than the stacking angle of pulverized coke.

7. The structure of a primary dedusting device for coke dry quenching according to claim 1, characterized in that The layered dust removal device is made of a high-temperature and corrosion-resistant metal plate with a thickness of more than 5 mm. The two sides of the parallel partitions are embedded in the lining bricks of the side walls of the dust collector body. The support structure consists of multiple support rods. One end of the support rod is fixedly connected to the layered dust removal device, and the other end is inserted into the lining bricks of the corresponding wall of the dust removal device body.

8. The structure of a primary deduster for coke dry quenching according to claim 7, characterized in that, The support rod is made of a high-temperature and corrosion-resistant metal or is built with refractory bricks.

9. The structure of a primary dedusting device for coke dry quenching according to claim 1, characterized in that, In the layered dust removal device, the parallel partitions and the small ash hoppers for partitions are built with refractory bricks, and the ash discharge channels for partitions are made of high-temperature and corrosion-resistant metal plates. The refractory bricks forming the parallel partitions and the small ash hoppers for partitions are built in an arch structure or a continuous arch structure in an interlocking manner, and are supported by a brick wall below the arch foot bricks.

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