Industrial washing tower

Abstract

The utility model discloses an industrial washing tower which comprises a tower body, a head tank, an inlet flue, an overflow cofferdam, a spray head, a circulating pump, a downcomer group, a filter press, a slurry pump, a slurry guide plate, an inclined slurry partition plate, a foam catching net and an outlet flue. The circulating pump conveys low-dust-content absorption liquid to be sprayed out through the spray head, and the low-dust-content absorption liquid is in reverse contact with pollutant-containing flue gas entering the combustion equipment from the inlet flue. And the formed high-concentration mine dust circulating liquid is guided to the bottom of the tower through the inclined slurry separation plate and flows to a slurry pump under the action of the slurry guide plate. Part of the slurry is layered in the downcomer group pipe under the action of gravity, the upper clear liquid is enriched at the circulating pump, and the mine dust is enriched at the slurry pump. After slurry is conveyed to a filter press through a slurry pump for filtration, filtrate is conveyed to a head tank. Clear liquid in the head tank automatically flows to the overflow cofferdam and flows back into the tower along the reverse spraying section. And the washed flue gas is filtered by the foam catching net and then is sent out from the outlet flue.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas washing, in particular to an industrial washing tower. Background Art

[0002] The scrubber, also known as the power wave, is a gas purification equipment. The equipment can simultaneously complete multiple functions such as flue gas quenching, acid gas removal, dust removal, etc. in one feed pipe. It can be used in many industrial fields, such as metallurgical industry, electric power, cement industry kiln, waste incineration, titanium dioxide plant, coking, petrochemical industry, etc.

[0003] The pollutant-containing flue gas from the combustion equipment enters the straight barrel type reverse nozzle from top to bottom, while the absorption liquid is sprayed from bottom to top and contacts with the gas in reverse. Due to the gas-liquid momentum balance principle, a uniform turbulent reaction area is formed, which is figuratively called the foam zone.

[0004] The foam zone is a gas-liquid mixing area with intense turbulence, reverse collision of gas and liquid, and rapid renewal of liquid surface. In this area, efficient mass transfer and heat transfer processes are realized to the maximum extent. The turbulent film of the absorption liquid wraps the dust in the flue gas, increasing its volume and facilitating its separation from the flue gas. In addition, due to the continuous evaporation of water in the absorption liquid, the gas is cooled to near adiabatic saturation temperature, and the temperature reduction reduces the equilibrium partial pressure of acid gas in the gas phase, prompting the acid gas to continuously react with the absorption liquid, realizing the functions of rapid cooling, acid gas absorption, and dust removal. After the flue gas and the absorption liquid contact in the reverse nozzle, they pass through the gas-liquid separation device in the tower together. Here, due to the action of gravity, the tiny droplets are separated from the flue gas, and the clean flue gas is discharged from the upper chimney. The absorption liquid is collected at the bottom of the scrubbing tower and equipped with a circulating pump to realize the circulation of the absorption liquid. In order to reduce the dust content inside the absorption liquid, a certain amount of absorption liquid drawn out during the circulation process is sent to the sedimentation tank for sedimentation. The bottom flow of the sedimentation tank is sent to the filter press for filtration. The filter cake can be directly sold or returned to the combustion system because it contains valuable metals. The filtrate and the supernatant of the sedimentation tank enter the supernatant storage tank and are sent to the high-level tank and overflow to the reverse nozzle to protect the flue and return the liquid.

[0005] However, the circulating pump on one side of the washing tower can only transport local liquid, and in order to ensure the circulation volume of the reverse spray pipe section, the dust reduction volume only accounts for 5% of the circulation volume. With the long-term operation of the equipment, a large amount of mineral dust accumulates in the tower, and the increase of the mud line causes the liquid level meter to be inaccurate. The high-density mineral dust accumulates at the bottom and has a large pressure impact on the wall of the washing tower, and liquid seepage will occur for a long time. The circulating liquid carrying a lot of mineral dust will also affect the effect of flue gas rapid cooling, acid gas removal, and dust removal. In addition, the tower tank needs to be cleaned of accumulated ore once a year, and dozens of people need to enter for a week to clean it, which poses safety and production risks.

[0006] Therefore, how to reduce the mineral dust content in the washing tower as much as possible is an issue worth studying. Utility Model Content

[0007] In view of this, the purpose of the utility model is to provide an industrial washing tower for reducing the mineral dust content in the tower.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] An industrial washing tower comprises a tower body, a high-level tank and a filter press, wherein an inlet flue is arranged at the upper part of the side wall of the tower body, an outlet flue is arranged at the top of the tower body, a foam catcher is arranged at the upper part of the tower body, an inclined mud partition plate is arranged below the foam catcher, a downcomer group is arranged below the inclined mud partition plate, an inclined mud guide plate is arranged at the bottom of the tower body, an outlet pipe is arranged horizontally at the bottom outlet of the high-level tank, an overflow cofferdam is arranged in the inlet flue and in the horizontal direction of the outlet pipe, the connection between the inlet flue and the tower body is located below the foam catcher, the inclined mud partition plate is arranged below the inclined mud partition plate, and the inlet flue is arranged below the inclined mud partition plate. A clear liquid outlet is provided on the side wall of the tower body between the downcomer group and the inclined mud partition plate above the partition plate. The clear liquid outlet is provided with a clear liquid pipeline. The clear liquid pipeline extends upward and extends into the inlet flue. A nozzle is provided at the water outlet end of the clear liquid pipeline to spray the flue gas passing through the overflow cofferdam and entering the inlet flue. A mud outlet is provided at the bottom of the side wall of the tower body. The mud outlet is connected to the filter press through a mud pipeline. The liquid outlet of the filter press is connected to the high-level tank through a pipeline. The lower side of the mud guide plate is located at the mud outlet.

[0010] Furthermore, the inclined mud separation plate includes an inclined plate and a vertical plate, the inclined plate is a circular plate with a notch, and the notch is located on the lower side, the vertical plate and the notch are connected, and the shape of the cross-section of the vertical plate is consistent with the shape of the notch, the vertical plate extends downward, and the bottom is flush with the lower end surface of the downcomer group.

[0011] Furthermore, the downcomer group is located below the inclined plate and is composed of a plurality of downcomers. Adjacent downcomers are fixedly connected, and the downcomer group is fixed on the inner wall of the tower body.

[0012] Furthermore, a circulation pump is provided on the clean liquid pipeline so that the clean liquid with low dust content is transported to the nozzle through the circulation pump.

[0013] Furthermore, a mud pump is provided on the mud pipeline so that the mud is transported to the filter press through the mud pump.

[0014] The utility model has the following effects: the entire washing process, through gravity natural sedimentation, diversion and enrichment, continuous conveying and filtration, achieves the dust removal effect of the entire washing tower, and the circulating liquid with relatively low dust content ensures the high effect of flue gas rapid cooling, removal of acidic gas and dust removal. It also delays the tower tank cleaning cycle and eliminates safety and production hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a structural schematic diagram of the utility model industrial washing tower;

[0016] In the figure: 1. tower body, 2. high-level tank, 3. inlet pipe, 4. overflow cofferdam, 5. clear liquid pipeline, 51. nozzle, 6. circulation pump, 7. downcomer, 8. mud pipeline, 9. filter press, 10. mud pump, 11. mud guide plate, 12. inclined mud partition plate, 13. foam catcher, 14. outlet flue. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited thereto.

[0018] An industrial scrubber, such as Figure 1 As shown, the tower body 1 comprises a tower body 1, a high-level tank 2 and a filter press 9. An inlet flue 3 is provided at the upper part of the side wall of the tower body 1, an outlet flue 14 is provided at the top of the tower body 1, a foam catcher 13 is provided at the upper part of the tower body 1, an inclined mud partition plate 12 is provided below the foam catcher 13, a downcomer group is provided below the inclined mud partition plate 12, an inclined mud guide plate 11 is provided at the bottom of the tower body 1, an outlet pipe is provided horizontally at the bottom outlet of the high-level tank 2, an overflow cofferdam 4 is provided in the inlet flue 3 and at the same level as the outlet pipe, and the connection between the inlet flue 3 and the tower body 1 is located below the foam catcher 13 and at the inclined mud partition plate 12. Above, a clear liquid outlet is provided on the side wall of the tower body 1 between the downcomer group and the inclined mud partition plate 12, and a clear liquid pipeline 5 is provided at the clear liquid outlet. The clear liquid pipeline 5 extends upward and extends into the inlet flue 3. A nozzle 51 is provided at the water outlet end of the clear liquid pipeline 5 to spray the flue gas entering the inlet flue 3 through the overflow cofferdam 4. A mud outlet is provided at the bottom of the side wall of the tower body 1. The mud outlet is connected to the filter press 9 through a mud pipeline 8 and a mud pump 10 arranged on the mud pipeline. The liquid outlet of the filter press 9 is connected to the high-level tank 2 through a pipeline. The lower side of the mud guide plate 11 is located at the mud outlet.

[0019] The inclined mud partition plate 12 includes an inclined plate and a vertical plate. The inclined plate is a circular plate with a notch, and the notch is located on the lower side. The vertical plate is connected to the notch, and the cross-section of the vertical plate is consistent with the shape of the notch. The vertical plate extends downward, and the bottom is flush with the lower end surface of the downcomer group. The size of the notch is determined by the dust content in the flue gas. The higher the dust content, the larger the notch, and the lower the dust content, the smaller the notch, so as to ensure that the liquid after the smoke is sprayed can smoothly pass through the inclined mud partition plate 12 to flow to the lower part of the tower body.

[0020] The downcomer group is located below the inclined plate and is composed of a plurality of downcomers 7 . Adjacent downcomers 7 are fixedly connected, and the downcomer group is fixed on the inner wall of the tower body 1 .

[0021] A circulation pump 6 is provided on the clean liquid pipeline 5 so that the clean liquid with low dust content is transported to the nozzle 51 through the circulation pump 6 .

[0022] When in use, the inlet end of the inlet flue is composed of carbon steel with an internal lining of rubber mud. When entering the tower body, the flue gas becomes wet and corrosive when in contact with water. Therefore, the flue is replaced with anti-corrosion fiberglass. Fiberglass is not resistant to high temperatures, so an overflow cofferdam 4 is provided at the switching point of the two flues to protect the flue.

[0023] The circulating pump 6 delivers the absorption liquid with low dust content and sprays it through the nozzle 51, which contacts the flue gas containing pollutants from the combustion equipment entering from the inlet flue 3 in reverse direction to form a reverse spray section. The inclined mud partition plate 12 makes the mixed liquid in the reverse spray section flow to the bottom of the tower, and under the action of the mud guide plate 11, it flows to the mud pump 10. The mud forms layers in the downcomer 7 due to gravity, the upper clear liquid is enriched at the circulating pump 6, and the mineral dust is enriched at the mud pump 10. The mud is transported to the filter press 9 by the mud pump 10 for filtration, and the filtrate is sent to the high-level tank 2. The clear liquid inside the high-level tank 2 flows back to the tower along the reverse spray section by gravity to the overflow cofferdam 4.

[0024] The washed flue gas is filtered by the foam catcher 13 and then sent out from the outlet flue 14.

[0025] During the whole washing process, the dust removal effect of the whole washing tower is achieved through natural sedimentation and enrichment by gravity, continuous transportation and filtration, and the circulating liquid with relatively low dust content ensures the high effect of flue gas rapid cooling, removal of acidic gas and dust removal. It also delays the cleaning cycle of the tower tank and eliminates safety and production risks.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions for the specific implementation of the present invention rather than to limit it. Ordinary technicians in the relevant technical field should understand that any equivalent substitution or obvious modification of the implementation mode of the present invention without changing its performance or use, without violating the purpose of the present invention, should be included in the scope of protection requested by the present invention.

Claims

1. An industrial washing tower, comprising a tower body, a high-level tank and a filter press, characterized in that: An inlet flue is provided at the upper part of the side wall of the tower body, an outlet flue is provided at the top of the tower body, a foam catcher net is provided at the upper part of the tower body, an inclined mud partition plate is provided below the foam catcher net, a downcomer group is provided below the inclined mud partition plate, an inclined mud guide plate is provided at the bottom of the tower body, an outlet pipe is provided horizontally at the bottom outlet of the high-level tank, an overflow cofferdam is provided in the inlet flue and horizontally corresponding to the outlet pipe, the connection between the inlet flue and the tower body is located below the foam catcher net and above the inclined mud partition plate, a clear liquid outlet is provided on the side wall of the tower body between the downcomer group and the inclined mud partition plate, the clear liquid outlet is provided with a clear liquid pipeline, the clear liquid pipeline extends upward and extends into the inlet flue, a nozzle is provided at the water outlet end of the clear liquid pipeline to spray the flue gas passing through the overflow cofferdam and entering the inlet flue, a mud outlet is provided at the bottom of the side wall of the tower body, the mud outlet is connected to the filter press through a mud pipeline, the liquid outlet of the filter press is connected to the high-level tank through a pipeline, and the lower side of the mud guide plate is located at the mud outlet.

2. The industrial washing tower according to claim 1, characterized in that The inclined mud separator includes an inclined plate and a vertical plate. The inclined plate is a circular plate with a notch, and the notch is located on the lower side. The vertical plate is connected to the notch, and the shape of the cross section of the vertical plate is consistent with the shape of the notch. The vertical plate extends downward, and the bottom is flush with the lower end surface of the downcomer group.

3. The industrial washing tower according to claim 2, characterized in that The downcomer group is located below the inclined plate and is composed of a plurality of downcomers. Adjacent downcomers are fixedly connected, and the downcomer group is fixed on the inner wall of the tower body.

4. The industrial washing tower according to claim 1, characterized in that A circulation pump is provided on the clean liquid pipeline so that the clean liquid with low dust content is transported to the nozzle through the circulation pump.

5. The industrial washing tower according to claim 1, characterized in that A mud pump is provided on the mud pipeline so that the mud is transported to the filter press through the mud pump.

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