A dry quenching coke primary dust collector structure

Abstract

This invention relates to a primary dust collector structure for dry quenching coke. The dust collector body is equipped with a layered dust collection device, which consists of a parallel partition, a small ash hopper in the partition, and a ash discharge channel in the partition. The inlet dust collection channel is located between the dust collector inlet and the dust collector ash hopper, and the outlet dust collection channel is located between the dust collector ash hopper and the dust collector outlet. The parallel partition separates the inlet and outlet dust collection channels into upper and lower layers. The middle part of the parallel partition is connected to the ash discharge channel in the partition through the small ash hopper, and the bottom outlet of the ash discharge channel is connected to the dust collector's ash discharge port. This invention improves the dust removal efficiency of the primary dust collector while ensuring convenient ash discharge.

Description

Technical Field

[0001] This invention relates to the field of dry quenching technology, and in particular to a high-efficiency dry quenching primary dust collector structure. Background Technology

[0002] Dry quenching technology is a quenching method that uses inert circulating gas to cool and lower the temperature of red-hot coke. It is superior to wet quenching technology in terms of energy saving, environmental protection, and improved coke quality, making it a crucial production link in the current coking industry. In the dry quenching process, inert circulating gas enters the dry quenching oven to cool the coke. The high-temperature, dust-laden flue gas, mixed with a large amount of fine coke, is removed by a primary dust collector before entering the boiler for heat exchange. It then undergoes further dust removal by a secondary dust collector and is finally recycled back into the dry quenching oven via a circulating fan.

[0003] Traditional primary dust collectors for dry quenching coke are gravity dust collectors. They separate dust from the gas by reducing the airflow velocity, offering advantages such as simple structure and low resistance, but relatively low dust removal efficiency. To improve efficiency, some primary dust collectors incorporate an upper baffle wall, transforming them into inertial dust collectors. However, due to long-term thermal expansion and gas erosion, the upper baffle wall is prone to deformation, detachment, or even collapse, affecting dust removal efficiency and the discharge of coke powder from the bottom. Low primary dust collector efficiency causes wear and tear on downstream boiler equipment, impacting the dust removal effect of secondary dust collectors, and consequently causing wear on the circulating fan, ultimately affecting stable dry quenching coke production.

[0004] Furthermore, the dust removal efficiency of a gravity dust collector is inversely proportional to its height. Therefore, some gravity dust collectors are equipped with parallel baffles to reduce dust settling time and improve dust removal efficiency. However, once the dust collector is layered, cleaning the accumulated dust becomes difficult. Generally, it is necessary to open the dust collector for cleaning or to periodically clean it with scrapers. The more layers there are, the more difficult it is to clean the accumulated dust. Summary of the Invention

[0005] This invention provides a structure for a primary dust collector for dry quenching coke. By setting a parallel partition, a partitioned ash hopper, and a partitioned ash discharge channel in the middle of the internal dust collection channel of the primary dust collector, the internal dust collection channel of the primary dust collector is divided into upper and lower layers, which improves the dust collection efficiency of the primary dust collector while ensuring the convenience of ash discharge.

[0006] To achieve the above objectives, the present invention employs the following technical solution:

[0007] A primary dust collector structure for dry quenching coke includes a dust collector body, with one end as the dust collector inlet and the other end as the dust collector outlet. A dust collector hopper is located in the middle of the dust collector body, and a dust collector discharge port is located at the bottom of the hopper. A layered dust collection device is installed within the dust collector body, consisting of a parallel partition, a small partition hopper, and a partition discharge channel. An inlet dust collection channel is located between the dust collector inlet and the dust collector hopper, and an outlet dust collection channel is located between the dust collector hopper and the dust collector outlet. The parallel partition separates the inlet and outlet dust collection channels into upper and lower layers. The middle of the parallel partition is connected to the partition discharge channel via the small partition hopper, and the bottom outlet of the partition discharge channel is connected to the dust collector discharge port. A support structure is provided between the layered dust collection device and the dust collector body, and the layered dust collection device is positioned and fixed by the support structure.

[0008] Furthermore, the parallel partition consists of an inlet parallel partition and an outlet parallel partition. Along the vertical direction, the inlet parallel partition is located in the middle of the inlet dust removal channel, and the outlet parallel partition is located 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 0.5m.

[0009] Furthermore, the inlet dust removal channel and the outlet dust removal channel are channels with equal cross-sections.

[0010] Furthermore, the inclination angle of the sidewall of the partition ash hopper is not greater than the inclination angle of the sidewall of the dust collector ash hopper, but is greater than the accumulation angle of the coke.

[0011] Furthermore, the number of the ash discharge channels in the partition is two or more.

[0012] Furthermore, along the transverse direction of the dust collector body, a conical section is provided at the top of the ash discharge channel, and the inclination angle of the side wall of the conical section is greater than the angle of accumulation of the coke.

[0013] Furthermore, the layered dust removal device is made of a high-temperature and corrosion-resistant metal plate with a thickness of 5mm or more; the two sides of the parallel partition are embedded in the lining bricks of the side wall of the dust collector body; the support structure consists of multiple support rods, one end of which 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 collector body.

[0014] Furthermore, the support rod is made of high-temperature and corrosion-resistant metal, or is constructed from refractory bricks.

[0015] Furthermore, in the layered dust removal device, the parallel partitions and the partition ash hoppers are constructed of refractory bricks, and the partition ash discharge channels are made of high-temperature and corrosion-resistant metal plates; the refractory bricks that make up the parallel partitions and the partition ash hoppers are constructed by interlocking arched or multi-arched structures, and the arch foot bricks are supported by brick walls below.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) By setting a parallel partition and a small ash hopper in the middle of 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, reducing the dust falling time, and improving the dust removal efficiency of the primary dust collector.

[0018] (2) The installation of the partitioned small ash hopper causes a sudden decrease in the gas velocity in the dust removal channel above the ash hopper. Under the influence of gravity, the dust separates from the gas and settles into the small ash hopper. At the same time, when the dust-laden gas in the dust removal channel below the partition flows through the small ash hopper, it collides with the side wall of the small ash hopper and changes the airflow direction. Under the influence of gravity and inertia, the separation of dust and gas is accelerated. Therefore, the installation of the partitioned small ash hopper can further improve the dust removal efficiency of the dust removal channels above and below the parallel partition.

[0019] (3) A closed ash discharge channel is set at the bottom of the small ash hopper of the partition layer, which can discharge the dust collected in the upper dust removal channel in real time without affecting the dust removal efficiency of the lower dust removal channel, thus solving the problem of difficult cleaning of accumulated ash and inability to produce continuously after the dust collector is layered in the industry. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a primary dust collector for dry quenching coke as described in this invention.

[0021] Figure 2 yes Figure 1 AA section Figure 1 .

[0022] Figure 3 yes Figure 1 AA section Figure 2 .

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

[0024] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0025] like Figure 1 As shown, the dry quenching coke primary dust collector structure of the present invention includes a dust collector body 1, one end of the dust collector body 1 is a dust collector inlet 2, 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 collection channel between the dust collector inlet 2 and the dust collector outlet 3 of the primary dust collector is a dust collection passage. Specifically, the inlet dust collection passage is between the dust collector inlet 2 and the dust collector hopper 4, and the outlet dust collection passage is between the dust collector hopper 4 and the dust collector outlet 3. This invention incorporates a parallel partition 6 within the dust collection channel, also divided into an inlet parallel partition and an outlet parallel partition. A small dust hopper 7 is positioned corresponding to the dust collector hopper 4 within the parallel partition 6. The bottom of the small dust hopper 7 connects to a partition ash discharge channel 8, and the bottom opening of the partition ash discharge channel 8 communicates with the dust collector discharge port 5. By dividing the dust collection channel inside the primary dust collector into upper and lower layers through the parallel partition 6, the height of the dust collection channel is effectively reduced, decreasing the dust settling time and thus improving dust collection efficiency.

[0027] Preferably, the parallel partition 6 of the present invention is positioned at the middle of the dust removal channel in the vertical direction, so that the cross-sectional areas of the upper and lower dust removal channels 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 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 together with the dust collected in the upper channel through the dust collector ash discharge port 5.

[0028] The partition ash hopper 7 causes a sudden decrease in gas velocity in the upper dust collection channel. Dust separates from the gas under gravity, settles into the partition ash hopper 7, and is discharged through the partition ash discharge channel 8. Simultaneously, when dust-laden gas flows through the partition ash hopper 7 in the lower dust collection channel, it collides with the sidewall of the partition ash hopper 7, changing the airflow direction. Under the influence of gravity and inertia, this accelerates the separation of dust and gas. Therefore, the partition ash hopper 7 further improves the dust collection efficiency of both the upper and lower dust collection channels. Furthermore, the dust collected in the upper dust collection channel is sealed and discharged through the partition ash discharge channel 8, preventing the airflow flowing through the lower dust collection channel from re-raising the dust and affecting the dust collection efficiency.

[0029] Preferably, the inclination angle of the sidewall of the partition hopper 7 is not greater than the inclination angle of the sidewall of the dust collector hopper 4. That is, the taper of the partition hopper 7 is the same as or smaller than the taper of the dust collector hopper 4. This ensures that when the airflow in the lower dust removal channel encounters the sidewall of the partition hopper 7 and changes direction downwards, the flow area gradually increases and the gas velocity gradually decreases, thereby improving the dust removal efficiency. However, the inclination angle of the sidewall of the partition hopper 7 must be greater than the angle of accumulation of the coke, so that the dust collected by the partition hopper 7 can automatically converge downwards and enter the partition ash discharge channel 8.

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

[0031] Preferably, the parallel partition 6, the partition ash hopper 7, and the partition ash discharge channel 8 of the present invention can be made of heat-resistant stainless steel or other metal materials, with a thickness of not less than 5 mm. Since the temperature of the dust-laden gas in the primary dust collector is relatively high (up to 850–980°C), the metal material used must be a high-temperature resistant metal, such as heat-resistant stainless steel like SUS310 or SUS314. To ensure the structural stability of the parallel partition 6, both sides of the parallel partition 6 are embedded in the corresponding lining bricks 11 of the dust collector body 1. Several support rods 9 can be installed below the parallel partition 6, with the other end of each support rod embedded in the lining bricks 11 of the dust collector body 1. The support rods 9 can be made of metal or constructed using refractory bricks.

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

[0033] To make the objectives, technical solutions, and technical effects of this invention clearer, the technical solutions in the embodiments of this invention are now described clearly and completely. However, the embodiments described below are only some embodiments of this invention, not all embodiments. All other embodiments obtained by those skilled in the art in conjunction with the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0034]

Example 1

[0035] like Figure 1 , Figure 2 As shown in this embodiment, a layered dust removal device is provided in the middle of the dust collector body 1 of the primary dust collector, including a parallel partition 6, a partitioned small ash hopper 7 and a partitioned ash discharge channel 8. All components are made of SUS310 heat-resistant stainless steel plate with a thickness of 15mm.

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

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

[0038]

Example 2

[0039] like Figure 1 , Figure 3 As shown in this embodiment, a layered dust collection device is provided in the middle of the dust collector body 1 of the primary dust collector, including a parallel partition 6, a partitioned small ash hopper 7, and a partitioned ash discharge channel 8. Both the parallel partition 6 and the partitioned small ash hopper 7 are constructed using Grade A mullite bricks. The parallel partition 6 is constructed using an arched structure, and the partitioned small ash hopper 7 is constructed using a stepped arch structure. The arch foot bricks of all the brick arch structures are embedded in the lining bricks 11 of the dust collector body 1.

[0040] In this embodiment, two ash discharge channels 8 are provided, both made of SUS314 heat-resistant stainless steel; in order to achieve better ash discharge, the top opening of the ash discharge channel 8 completely covers the bottom opening of the small ash hopper 7.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A dry quenching coke primary dust collector structure, comprising a dust collector body, one end of which is a dust collector inlet and the other end is a dust collector outlet, a dust collector hopper is provided in the middle of the dust collector body, and a dust collector ash discharge port is provided at the bottom of the dust collector hopper; characterized in that, The dust collector body is equipped with a layered dust removal device, which consists of a parallel partition, a partition hopper, and a partition ash discharge channel. The inlet dust removal channel is between the dust collector inlet and the dust collector hopper, and the outlet dust removal channel is between the dust collector hopper and the dust collector outlet. The parallel partition separates the inlet and outlet dust removal channels into upper and lower layers. The middle of the parallel partition is connected to the partition ash discharge channel via the partition hopper, and the bottom outlet of the partition ash discharge channel is connected to the dust collector's ash discharge port. There are two or more partition ash discharge channels. The sidewall inclination angle of the partition hopper is not greater than the sidewall inclination angle of the dust collector hopper, but greater than the angle of accumulation of the coke. 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 by the support structure.

2. The structure of a primary dust collector for dry quenching coke as described in claim 1, characterized in that, The parallel partition consists of an inlet parallel partition and an outlet parallel partition. Along the vertical direction, the inlet parallel partition is located in the middle of the inlet dust removal channel, and the outlet parallel partition is located 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 0.5m.

3. The structure of a primary dust collector for dry quenching coke as described in 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 dust collector for dry quenching coke as described in claim 1, 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, and the inclination angle of the side wall of the conical section is greater than the angle of accumulation of the coke.

5. The structure of a primary dust collector for dry quenching coke as described in 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 5mm or more; the two sides of the parallel partition are embedded in the lining bricks of the side wall of the dust collector body; the support structure consists of multiple support rods, one end of which 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 collector body.

6. The structure of a primary dust collector for dry quenching coke as described in claim 5, characterized in that, The support rod is made of high-temperature and corrosion-resistant metal or constructed of refractory bricks.

7. The structure of a primary dust collector for dry quenching coke as described in claim 1, characterized in that, In the layered dust removal device, the parallel partition and the small ash hopper of the partition are made of refractory bricks, and the ash discharge channel of the partition is made of high temperature and corrosion resistant metal plate; the refractory bricks that make up the parallel partition and the small ash hopper of the partition are interlocked in an arched structure or a continuous arch structure, and the arch foot bricks are supported by brick walls below.

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