CN116850704A - Cooling gravity dust collector and processing system and method for high-temperature dusty gas - Google Patents

Abstract

The invention discloses a cooling gravity dust remover, a high-temperature dust-containing gas treatment system and a high-temperature dust-containing gas treatment method, and solves the technical problem that the cooling effect of the gravity dust remover on high-temperature flue gas is not obvious in the prior art. The cooling gravity dust remover is provided with a barrel body and an ash bucket which are distributed from top to bottom, and comprises an air inlet channel, an air outlet channel and a partition plate, wherein: the air inlet channel and the air outlet channel extend from the lower end of the cylinder to the outside of the upper end of the cylinder; the air outlet channels are annularly distributed around the air inlet channels; a cooling water flow channel is formed among the air inlet channel, the air outlet channel and the cylinder; the baffle is provided with coordination holes matched with the air inlet channel and the air outlet channel, and the outer edge of the baffle is connected with the upper end of the ash bucket and isolates the cooling water flow channel from the ash bucket.

Description

Cooling gravity dust collector and processing system and method for high-temperature dusty gas

Technical field

The present invention relates to the technical field of high-temperature dust-containing gases, and specifically to a cooling gravity dust collector and a processing system and method for high-temperature dust-containing gases.

Background technique

Traditional gravity dust collectors do not have a water-cooling structure or add a water-cooling jacket to the shell of the gravity dust collector. The cooling effect on high-temperature flue gas is not obvious and can only achieve pre-dust removal of flue gas.

Contents of the invention

The main purpose of the present invention is to provide a cooling gravity dust collector and a processing system and method for high-temperature dust-containing gas, so as to solve the technical problem in the prior art that the gravity dust collector has an insignificant cooling effect on high-temperature flue gas.

In order to achieve the above objects, the present invention first provides a cooling gravity dust collector. The technical solution is as follows:

The cooling gravity dust collector has a cylinder and an ash hopper distributed from top to bottom, including an air inlet channel, an air outlet channel and a partition, wherein: the air inlet channel and the air outlet channel extend from the lower end of the barrel to the outside of the upper end of the barrel ; The air outlet channel is annularly distributed around the air inlet channel; a cooling water flow channel is formed between the air inlet channel, the air outlet channel and the cylinder; the partition plate is provided with an air inlet channel that is adapted to the air inlet channel and the air outlet channel. Coordinating holes, the outer edge of the partition plate is connected to the upper end of the ash hopper and isolates the cooling water flow channel from the ash hopper.

As a further improvement of the present invention, an air distribution structure is provided in the air inlet channel, and the air distribution structure includes a circular tube placed coaxially with the air inlet channel and extending to the lower end of the cylinder.

As a further improvement of the present invention, the gas distribution structure further includes a tapered tube provided at the upper end of the circular tube.

As a further improvement of the present invention, the air inlet channel is provided with a first pipe and a second pipe distributed from top to bottom, the diameter of the second pipe is larger than the diameter of the first pipe, and the air distribution structure is provided on the third pipe. In the second pipe, the upper end of the gas distribution structure is lower than the upper end of the second pipe body.

As a further improvement of the present invention, the pipe diameter of the cylinder is larger than the diameter of the inlet end of the ash hopper. A cooling water jacket is provided on the outside of the ash hopper that is connected to the cooling water flow channel. The upper end of the cooling water jacket is connected to the cylinder. The lower end is docked, and the lower end of the cooling water jacket is sealingly connected to the ash hopper shell.

As a further improvement of the present invention, it also includes a guide tube, with a gap left between the upper end of the guide tube and the upper end of the cylinder, and the lower end of the guide tube is connected to the outer edge of the partition; it also includes a water inlet structure, and the water inlet structure It has a first water inlet connected with the cooling water jacket.

As a further improvement of the present invention, the water inlet structure further includes a second water inlet connected with the cooling water flow channel between the guide tube and the air outlet channel; and/or, the water inlet structure further includes a second water inlet connected with the air outlet channel and the air outlet channel. The cooling water flow channel between the air intake channels is connected to a third water inlet.

As a further improvement of the present invention, the air inlet passage is provided with a first pipe and a second pipe distributed from top to bottom, and the diameter of the second pipe is larger than the diameter of the first pipe; the number of the air outlet passages is at least 3.

In order to achieve the above object, the present invention secondly provides a processing system for high-temperature dust-containing gas. The technical solution is as follows:

The treatment system for high-temperature dusty gas includes the above-mentioned cooling gravity dust collector.

In order to achieve the above object, the present invention further provides a method for processing high-temperature dust-containing gas. The technical solution is as follows:

The treatment method of high-temperature dusty gas is to use the above-mentioned cooling gravity dust collector to cool down the high-temperature dusty gas and remove dust by gravity.

The cooling gravity dust collector of the present invention has the following advantages: (1) On the basis of retaining the gravity dust removal function of the traditional gravity dust collector, a water-cooling structure is added inside the cylinder to achieve the purpose of pre-dust removal and cooling of flue gas at the same time in one device , which greatly saves the layout space of the system. (2) Extend the air outlet channel to the lower end of the cylinder, and design the gap between the air inlet channel, the air outlet channel and the cylinder as a cooling water flow channel, so that effective heat exchange can occur on the outside of the air inlet channel and the air outlet channel. , greatly increasing the heat exchange area and improving the cooling effect. (3) It has multiple gas outlet pipes, which can meet the flue gas flow rate under high heat exchange efficiency conditions.

It can be seen that the cooling gravity dust collector of the present invention has a simple structure, an ingenious conception, and has both pre-dust removal and cooling functions. When applied to the treatment of high-temperature dust-containing gases, it can significantly reduce the footprint of the treatment system, simplify the treatment process, and has extremely strong of practicality.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Additional aspects and advantages of the invention 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 the invention.

Description of the drawings

The drawings that form a part of the present invention are used to assist the understanding of the present invention. The contents provided in the drawings and their relevant descriptions in the present invention can be used to explain the present invention, but do not constitute an improper limitation of the present invention. In the attached picture:

Figure 1 is an axial cross-sectional view of a cooling gravity dust collector according to Embodiment 1 of the present invention.

Figure 2 is a top view of the cooling gravity dust collector according to Embodiment 1 of the present invention.

Figure 3 is an axial cross-sectional view of the cooling gravity dust collector according to Embodiment 2 of the present invention.

Figure 4 is an axial cross-sectional view of the cooling gravity dust collector according to Embodiment 3 of the present invention.

Figure 5 is an axial cross-sectional view of the cooling gravity dust collector according to Embodiment 4 of the present invention.

Figure 6 is an axial cross-sectional view of the cooling gravity dust collector according to Embodiment 5 of the present invention.

Figure 7 is a radial cross-sectional view of the cooling gravity dust collector according to Embodiment 5 of the present invention.

The relevant marks in the above drawings are:

110-cylinder, 120-ash hopper, 210-air inlet channel, 211-first pipe, 212-second pipe, 220-air outlet channel, 230-partition plate, 310-cooling water flow channel, 320-cooling water clamp Set, 330 - guide tube, 410 - round tube, 420 - tapered tube, 510 - first water inlet, 520 - second water inlet, 530 - third water inlet, 600 - ear support.

Detailed ways

The present invention will be clearly and completely described below in conjunction with the accompanying drawings. A person of ordinary skill in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be particularly pointed out that:

The technical solutions and technical features provided in each part of the present invention, including the following description, can be combined with each other if there is no conflict.

In addition, the embodiments of the present invention mentioned in the following description are generally only some embodiments of the present invention, rather than all the embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts should fall within the scope of protection of the present invention.

Regarding terms and units in this invention. The terms "including", "having" and any variations thereof in the description and claims of the present invention and related parts are intended to cover non-exclusive inclusion.

Example 1

Figure 1 is an axial cross-sectional view of the cooling gravity dust collector of this embodiment. Figure 2 is a top view of the cooling gravity dust collector of this embodiment.

As shown in Figure 1-2, the cooling gravity dust collector has a cylinder 110, an ash hopper 120, an air inlet channel 210, an air outlet channel 220, a partition 230 and a water inlet structure distributed from top to bottom.

The air inlet channel 210 and the air outlet channel 220 extend from the lower end of the barrel 110 to the outside of the upper end of the barrel 110; the air outlet channel 220 is annularly distributed around the air inlet channel 210; the air inlet channel 210, the air outlet channel 220 and A cooling water flow channel 310 is formed between the cylinders 110 .

The partition 230 is provided with coordination holes that are adapted to the air inlet channel 210 and the air outlet channel 220. The outer edge of the partition 230 is connected to the upper end of the ash hopper 120 and isolates the cooling water flow channel 310 from the ash hopper 120. .

The air inlet channel 210 is provided with a first pipe 211 and a second pipe 212 distributed from top to bottom. The diameter of the second pipe 212 is larger than the diameter of the first pipe 211 . This can reduce the gas flow rate and help improve the gravity dust removal effect.

The number of the air outlet channels 220 is preferably at least three, which can increase the heat exchange area between the outlet air and the cooling water and ensure a better cooling effect. In this embodiment, the number of the air outlet channels 220 is specifically six.

In order to maintain the stability of the system, it is preferable that the sum of the cross-sectional areas of all the air outlet channels 220 is equal to the cross-sectional area of the first pipe 211 .

The water inlet of the water inlet structure is located at the lower part of the cylinder 110, and the water outlet of the cooling water flow channel 310 is located at the upper part of the cylinder 110. The water inlet and the water outlet are arranged at the furthest distance to extend the flow path of the cooling water.

Example 2

Figure 3 is an axial cross-sectional view of the cooling gravity dust collector of this embodiment.

Compared with Embodiment 1, the cooling gravity dust collector of this embodiment further has the following settings: as shown in Figure 3, an air distribution structure is provided in the air inlet channel 210, and the air distribution structure includes an air inlet channel 210 and The circular tube 410 is placed coaxially and extends to the lower end of the cylinder 110; the gas distribution structure is located in the second pipe 212, and the upper end of the gas distribution structure is shorter than the upper end of the second pipe body. Therefore, firstly, the gas in the air inlet channel 210 is dispersed between the circular tube 410 and the inner wall of the air inlet channel 210, thereby improving the cooling effect on the gas in the air inlet channel 210. Secondly, the gas is diffused into the ash hopper 120, This helps to make the flow of gas entering each air outlet channel 220 consistent, further improving the uniformity of cooling and maintaining the temperature stability of the system.

The inside of the circular tube 410 is a hollow structure connected with the ash hopper 120, thereby increasing the gas flow space and improving the gravity dust removal effect.

Example 3

Figure 4 is an axial cross-sectional view of the cooling gravity dust collector of this embodiment.

Compared with Embodiment 2, the cooling gravity dust collector of this embodiment further has the following settings: As shown in FIG. 4 , the air distribution structure also includes a tapered tube 420 provided at the upper end of the circular tube 410 . Therefore, the outside of the conical tube 420 is a slope, which can prevent dust accumulation on the top of the air distribution structure.

Example 4

Figure 5 is an axial cross-sectional view of the cooling gravity dust collector of this embodiment.

Compared with Embodiment 3, the cooling gravity dust collector of this embodiment further has the following settings: As shown in Figure 5, the pipe diameter of the cylinder 110 is larger than the diameter of the inlet end of the ash hopper 120, and is provided outside the ash hopper 120. There is a cooling water jacket 320 that is connected to the cooling water flow channel 310. The upper end of the cooling water jacket 320 is connected to the lower end of the cylinder 110, and the lower end of the cooling water jacket 320 is sealed with the ash hopper 120 shell. Therefore, through the combination of the cooling water flow channel 310 and the cooling water jacket 320, the cooling effect is significantly improved.

The water inlet structure has a first water inlet 510 that communicates with the cooling water jacket 320, thereby further extending the flow path of the cooling water and allowing the cooling water to fully exert its cooling effect.

Example 5

Figure 6 is an axial cross-sectional view of the cooling gravity dust collector of this embodiment. Figure 7 is a radial cross-sectional view of the cooling gravity dust collector of this embodiment.

Compared with Embodiment 4, the cooling gravity dust collector of this embodiment further has the following settings: as shown in Figure 6, it also includes a guide tube 330. There is a gap between the upper end of the guide tube 330 and the upper end of the cylinder 110. The lower end of the flow tube 330 is connected with the outer edge of the partition plate 230 . This further extends the cooling water flow path and improves the cooling effect.

In order to ensure the air distribution effect, it is preferable to make the cross-sectional area of the gap between the second pipe 212 and the circular pipe 410 larger than or equal to the cross-sectional area of the first pipe 211 . At the same time, in order to ensure a larger cooling water flow space, it is preferable that the ratio of the diameter of the second pipe 212 to the diameter of the first pipe 211 is (1.5˜2):1.

The water inlet structure also includes a second water inlet 520 connected with the cooling water flow channel 310 between the guide tube 330 and the air outlet channel 220; the water inlet structure also includes a second water inlet 520 connected between the air outlet channel 220 and the air inlet channel 210. The cooling water flow channel 310 is connected to the third water inlet 530 . This helps to ensure uniform water inflow throughout the cooling water flow channel 310 .

When in use, the ear-type support 600 with a rigid ring is used to install the cooling gravity dust collector. The ear support 600 can be connected to the cylinder 110, or can be directly connected to the guide cylinder 330 as shown in Figure 7. The upper ends of the air inlet channel 210 and the air outlet channel 220 are connected to corresponding pipes through flanges.

An embodiment of the high-temperature dust-containing gas treatment system of the present invention includes the cooling gravity dust collector described in any of the above embodiments. The rear end of the cooling gravity dust collector is usually equipped with a high-temperature filter, desulfurization equipment and denitrification equipment to achieve deep dust removal and desulfurization and denitrification treatment of high-temperature dusty gas.

An embodiment of the method for treating high-temperature dust-containing gas of the present invention is to use the cooling gravity dust collector described in any of the above embodiments to cool the high-temperature dust-containing gas and perform gravity dust removal.

The high-temperature dust-containing gas may be, but is not limited to, any one of non-ferrous metal smelting flue gas, submerged arc furnace flue gas, steel plant flue gas, coal chemical flue gas, cement kiln flue gas, and glass kiln flue gas.

The relevant contents of the present invention have been described above. A person of ordinary skill in the art will be able to implement the present invention based on these descriptions. Based on the above contents of the present invention, all other embodiments obtained by those of ordinary skill in the art without any creative work should fall within the scope of protection of the present invention.

Claims (10)

1. The cooling gravity dust collector has a cylinder (110) and an ash hopper (120) distributed from top to bottom, and is characterized by: including an air inlet channel (210), an air outlet channel (220) and a partition (230), in: The air inlet channel (210) and the air outlet channel (220) extend from the lower end of the barrel (110) to the outside of the upper end of the barrel (110); The air outlet channel (220) is annularly distributed around the air inlet channel (210); A cooling water flow channel (310) is formed between the air inlet channel (210), the air outlet channel (220) and the cylinder (110); The partition (230) is provided with coordination holes that are adapted to the air inlet channel (210) and the air outlet channel (220). The outer edge of the partition (230) is connected to the upper end of the ash hopper (120) and is connected to the upper end of the ash hopper (120). The cooling water flow channel (310) and the ash hopper (120) are isolated. 2. The cooling gravity dust collector according to claim 1, characterized in that: an air distribution structure is provided in the air inlet channel (210), and the air distribution structure includes a gas distributing structure placed coaxially with the air inlet channel (210) and extending to the circular tube (410) at the lower end of the cylinder (110). 3. The cooling gravity dust collector according to claim 2, characterized in that the air distribution structure further includes a tapered tube (420) located at the upper end of the circular tube (410). 4. The cooling gravity dust collector according to claim 2, characterized in that the air inlet channel (210) is provided with a first pipe (211) and a second pipe (212) distributed from top to bottom. The diameter of the pipe (212) is larger than the diameter of the first pipe (211). The gas distribution structure is located in the second pipe (212), and the upper end of the gas distribution structure is shorter than the upper end of the second pipe body. 5. The cooling gravity dust collector according to claim 1, characterized in that: the pipe diameter of the cylinder (110) is larger than the diameter of the inlet end of the ash hopper (120), and a cooling and cooling system is provided outside the ash hopper (120). The cooling water jacket (320) is connected to the water flow channel (310). The upper end of the cooling water jacket (320) is connected to the lower end of the cylinder (110). The lower end of the cooling water jacket (320) is connected to the ash hopper (120). Housing seal connection. 6. The cooling gravity dust collector according to claim 5, characterized in that: it also includes a guide tube (330), and there is a gap between the upper end of the guide tube (330) and the upper end of the cylinder (110). The lower end of the water inlet 330) is connected to the outer edge of the partition plate (230); it also includes a water inlet structure having a first water inlet (510) connected with the cooling water jacket (320). 7. The cooling gravity dust collector according to claim 6, characterized in that: the water inlet structure further includes a cooling water flow channel (310) connected between the guide tube (330) and the air outlet channel (220). a second water inlet (520); and/or the water inlet structure also includes a third water inlet (530) connected to the cooling water flow channel (310) between the air outlet channel (220) and the air inlet channel (210). ). 8. The cooling gravity dust collector according to claim 1, characterized in that the air inlet channel (210) is provided with a first pipe (211) and a second pipe (212) distributed from top to bottom. The diameter of the pipe (212) is larger than the diameter of the first pipe (211); the number of the air outlet channels (220) is at least three. 9. A high-temperature dust-containing gas processing system, characterized by: including the cooling gravity dust collector described in one of claims 1-8. 10. A method for treating high-temperature dust-containing gas, which is characterized in that: the cooling gravity dust collector according to one of claims 1 to 8 is used to cool down the high-temperature dust-containing gas and perform gravity dust removal.