Carbonization furnace flue gas desulfurization, dust removal and purification system
By designing wiper and uniform mechanisms in the flue gas desulfurization and dust removal equipment of the carbonization furnace, the rotating scraper and cone form a splashing mist, increasing the contact area and time between the flue gas and liquid, the existing equipment is easily blocked and purified. The problem of low efficiency has achieved efficient and long-term operational flue gas purification effect.
Patent Information
- Application Number
- CN202421434867.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-06-21
AI Technical Summary
The existing carbonization furnace flue gas desulfurization and dust removal purification equipment has problems such as the nozzles being easily blocked, damaged, frequent maintenance, and low purification efficiency. The uneven distribution of flue gas in the equipment leads to a small contact surface and a short contact time, which makes it impossible to fully purify.
A system including a shell, a rotary shaft, a wiper mechanism and a uniform gas mechanism is designed. By pre-injecting alkaline cleaning liquid into the shell, the rotating scraper and cone form splashes and water mist, increasing smoke and liquid The contact area and time of the contact area can realize multiple dust removal and desulfurization, and improve the utilization rate of cleaning liquid through the return water pump.
It realizes long-term and efficient operation of the equipment, improves the purification efficiency and effect of the flue gas, avoids the nozzle blockage and damage, ensures the uniform purification of the flue gas in various parts, and extends the service life of the equipment.
Smart Images
Figure CN222239602U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flue gas purification, in particular to a flue gas desulfurization and dust removal purification system for a carbonization furnace. Background Art
[0002] In the production process of clean coal, qualified raw coal is generally purchased from the coal preparation plant. After crushing, screening and metering, the raw coal is mixed with asphalt, tar, additives, etc., and then heated and kept warm. After heating and keeping warm, it is molded to obtain semi-finished coal. The semi-finished coal enters the carbonization furnace for carbonization, and finally the finished coal is quenched. Among them, when the semi-finished coal is carbonized in the carbonization furnace, a large amount of flue gas will be generated. These flue gases contain a large amount of dust and sulfur-containing harmful substances. In order to meet the emission standards of flue gas and avoid pollution of the surrounding environment, the flue gas of the carbonization furnace needs to be desulfurized and dust-purified.
[0003] Most of the existing flue gas desulfurization and dust removal purification equipment is a spray structure. The nozzle sprays atomized alkaline cleaning liquid, and uses the atomized liquid droplets to absorb dust and sulfur-containing harmful substances in the flue gas to achieve the purpose of desulfurization and dust removal. However, there are often the following problems during use: First, in order to save alkaline cleaning liquid, it will be recycled and reused. Although a certain amount of precipitation purification has been carried out, the impurity content is still high, which makes the nozzle very easy to clog and damage, the maintenance and replacement frequency is high, the continuous operation time of the equipment is short, and the flue gas purification efficiency is reduced; second, the flue gas usually enters the interior from the bottom of the equipment, and then flows upward by itself, and contacts with the falling atomized liquid droplets to achieve the purpose of desulfurization and dust removal. However, during the rising process of the flue gas, there is an uneven distribution problem on the cross section of the equipment, which leads to a smaller contact surface between the atomized liquid droplets and the flue gas, and part of the flue gas is discharged before it has time to fully contact with the atomized liquid droplets, and the overall flue gas purification effect is not ideal. Therefore, it is an objective need to develop a carbonization furnace flue gas desulfurization and dust removal purification system that can operate efficiently for a long time, has high working efficiency, and has good purification effect. Utility Model Content
[0004] The utility model aims to provide a carbonization furnace flue gas desulfurization and dust removal purification system which can operate efficiently for a long time, has high working efficiency and good purification effect.
[0005] The purpose of the utility model is achieved in this way, including a shell and an exhaust port arranged on the top of the shell, a rotating shaft is arranged on the vertical center line in the shell, the upper end of the rotating shaft extends out of the top of the shell and is connected to the driving device, and a wiper mechanism and an air equalizing mechanism are alternately arranged from top to bottom on the rotating shaft in the shell, the wiper mechanism includes a plurality of connecting rods evenly distributed around the circumference, a scraper is arranged at the end of the connecting rod, a cone is arranged on the side wall of the shell, the small mouth end of the cone is suspended downward, the lower end face of the scraper coincides with the upper surface of the corresponding cone, and the plate surface of the scraper is inclined compared to the upper surface of the cone, the air equalizing mechanism includes a orifice plate and an upper air pipe arranged on each opening of the orifice plate, a baffle is arranged above the upper air pipe through a connecting plate, an annular gap is formed between the orifice plate and the side wall of the shell, a plurality of liquid inlet pipes are evenly distributed around the circumference on the side wall of the shell above each cone, a plurality of inclined plates are evenly distributed around the circumference on the lower end of the rotating shaft, a short cylinder is arranged at the outer end of the inclined plate, and a smoke inlet pipe is arranged on the side wall of the shell below the short cylinder.
[0006] Furthermore, a return pipe is provided at the lower part of the shell, a return pump is provided on the return pipe, and an annular pipe is provided on the shell outside each cone, the inner side of the annular pipe is connected to the corresponding liquid inlet pipe, and the outer side of the annular pipe is connected to the return pipe.
[0007] Furthermore, a high temperature resistant dust collector is arranged on the flue gas inlet pipe, and a dehumidifier is arranged on the top of the shell.
[0008] Furthermore, an air homogenizer is arranged in the shell below the inclined plate, and the end of the smoke inlet pipe is extended into the shell and communicated with the air inlet end of the air homogenizer.
[0009] Furthermore, an annular water-splashing plate with a concave center is arranged on the rotating shaft between the adjacent wiper mechanisms and the air equalizing mechanism, and an inner extension tube is arranged on the side wall of the shell. The end of the inner extension tube extends into the shell and is located above the annular water-splashing plate.
[0010] Furthermore, the lower part of the rotating shaft is connected to an anti-sway bar through a bearing, and the end of the anti-sway bar is fixedly connected to the side wall of the shell.
[0011] When the utility model is in operation, a certain amount of alkaline cleaning liquid is first introduced into the shell, so that the lower ends of the inclined plate and the short cylinder are immersed in the liquid, the driving device is started, the rotating shaft is driven to rotate, and the rotating shaft drives the wiper mechanism and the air equalization mechanism to rotate, and the alkaline cleaning liquid is continuously introduced into the shell through the liquid inlet pipe, and the smoke from the carbonization furnace is introduced into the shell from the smoke inlet pipe. Since a certain amount of alkaline cleaning liquid is pre-introduced into the shell, these liquids are accumulated at the bottom of the shell, and the smoke first enters these liquids and continuously rises in the liquid. When it hits the inclined plate, it is further broken into smaller bubbles by the inclined plate, completing the first dust removal and desulfurization, and then leaves the liquid surface and continues to rise. At this time, the inclined plate is in a rapid rotation process, and the liquid is continuously shaken by it. Splashing upward, the flue gas contacts with the splashing liquid to complete the second dust removal and desulfurization, and then the flue gas continues to flow upward through the upper air pipe. On the one hand, the flue gas is evenly distributed on the cross-section of the shell, and on the other hand, since the upper air pipe and the orifice plate are in the process of rotation, when the flue gas is ejected from the upper air pipe, a vortex will be formed in the shell, which can ensure the contact area between the flue gas and the liquid droplets and prolong the contact time between the two to complete the third dust removal and desulfurization. At the same time, the scraper scrapes up the liquid on the cone during the rotation, and forms splashes and water mist, which scatters in the shell and contacts with the rising flue gas to complete the fourth dust removal and desulfurization. By analogy, the flue gas is constantly in contact with the alkaline water mist during the rising process to complete the dust removal and desulfurization. During operation, the utility model utilizes the inclined plate and the wiper mechanism to make the alkaline liquid form splashes and water mist. Even if there are many impurities in the liquid, it can still operate normally, eliminating the use of traditional nozzles, fundamentally eliminating the blockage and damage problems caused by the use of nozzles, and the equipment no longer needs frequent maintenance and replacement, and can maintain long-term high-efficiency continuous operation, thereby improving the purification efficiency of flue gas; secondly, during the rising process of the flue gas, it has undergone several dust removal and desulfurization operations, and the flue gas is evenly distributed on the cross section of the shell. In addition, the flue gas is in a rotating flow state as a whole, which not only increases the contact area between the atomized droplets and the flue gas, but also prolongs the time. The contact time between the two is increased, and the purification effect of the flue gas is improved; finally, the alkaline cleaning liquid in the utility model is introduced into the shell from the liquid inlet pipe above each cone. As the liquid continues to converge, the amount of liquid in the lower part of the shell is larger, and more splashes and water mist are formed. The flue gas flows upward from the lower part of the shell. When it is located at the bottom, the content of dust and sulfur-containing substances is the largest. With continuous purification, the content of dust and sulfur-containing substances is lower at the top. This operation mode ensures that the demand for alkaline cleaning liquid when the flue gas is located in various parts can be met during the flue gas purification process, ensuring that the flue gas can be fully dust-removed, desulfurized and purified. In summary, the utility model has the advantages of long-term and efficient operation, high work efficiency and good purification effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0013] Figure 2 It is a schematic diagram of the top view of the structure of the inclined plate 9 and the short cylinder 10 in the utility model;
[0014] Figure 3 It is a schematic diagram of the structure of the scraper 20 and the cone 4 in the utility model;
[0015] In the figure: 1-shell, 2-rotating shaft, 3-connecting rod, 4-cone, 5-orifice plate, 6-upper air pipe, 7-shield, 8-liquid inlet pipe, 9-inclined plate, 10-short cylinder, 11-smoke inlet pipe, 12-return pipe, 13-annular pipe, 14-high temperature resistant dust collector, 15-dehumidifier, 16-aerator, 17-annular water-throwing plate, 18-inner extension pipe, 19-anti-sway rod, 20-scraper. DETAILED DESCRIPTION
[0016] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or improvements made based on the present invention belong to the protection scope of the present invention.
[0017] like Figures 1-2 As shown, the utility model includes a shell 1 and an exhaust port arranged on the top of the shell 1, a rotating shaft 2 is arranged on the vertical center line in the shell 1, and the upper end of the rotating shaft 2 extends out of the top of the shell 1 and is connected to a driving device, and a wiper mechanism and an air equalization mechanism are alternately arranged on the rotating shaft 2 in the shell 1 from top to bottom, and the wiper mechanism includes a plurality of connecting rods 3 evenly distributed around the circumference, and a scraper 20 is arranged at the end of the connecting rod 3. A cone 4 is arranged on the side wall of the shell 1, and the small end of the cone 4 is suspended downward, and the lower end surface of the scraper 20 coincides with the upper surface of the corresponding cone 4, and the plate surface of the scraper 20 is inclined compared to the upper surface of the cone 4. The air equalization mechanism includes an orifice plate 5 and an upper air pipe 6 arranged on each opening of the orifice plate 5. The orifice plate 5 is a prior art, and has a plurality of openings evenly distributed thereon. A baffle 7 is provided above 6 through a connecting plate, and an annular gap is formed between the orifice plate 5 and the side wall of the shell 1. To prevent the flue gas from passing directly through the gap, when the orifice plate 5 is set, the width of the annular gap should be as small as possible to facilitate the passage of the alkaline cleaning liquid, so that a dynamic seal can be formed by using the liquid. During operation, even if the gap is too large, a water curtain can be formed in the above gap due to the alkaline cleaning liquid being thrown out from the edge of the orifice plate 5. When the flue gas passes through the gap, it can also contact the water curtain, and the flue gas can still be purified. A plurality of liquid inlet pipes 8 are evenly distributed on the circumference of the side wall of the shell 1 above each cone 4, and a plurality of inclined plates 9 are evenly distributed on the circumference of the lower end of the rotating shaft 2. A short cylinder 10 is provided at the outer end of the inclined plate 9, and a flue gas inlet pipe 11 is provided on the side wall of the shell 1 below the short cylinder 10.
[0018] When the utility model is in operation, a certain amount of alkaline cleaning liquid is first introduced into the shell 1, so that the lower ends of the inclined plate 9 and the short cylinder 10 are immersed in the liquid, the driving device is started, and the rotating shaft 2 is driven to rotate. The rotating shaft 2 drives the wiper mechanism and the air equalization mechanism to rotate, and the alkaline cleaning liquid is continuously introduced into the shell 1 through the liquid inlet pipe 8, and the carbonization furnace flue gas is introduced into the shell 1 from the flue gas inlet pipe 11. Since a certain amount of alkaline cleaning liquid is pre-introduced into the shell 1, these liquids are accumulated at the bottom of the shell 1. The flue gas first enters these liquids and continuously rises in the liquid. When it hits the inclined plate 9, it is further broken into smaller bubbles by the inclined plate 9, completing the first dust removal and desulfurization, and then leaves the liquid surface and continues to rise. At this time, the inclined plate 9 is in a rapid rotation process, and the liquid continuously splashes upward under its swing, and the flue gas is The flue gas contacts these splashed liquids to complete the second dust removal and desulfurization, and then the flue gas continues to flow upward through the upper air pipe 6. On the one hand, the flue gas is evenly distributed on the cross section of the shell 1. On the other hand, since the upper air pipe 6 and the orifice plate 5 are in the process of rotation, when the flue gas is ejected from the upper air pipe 6, a vortex will be formed in the shell 1, which can ensure the contact area between the flue gas and the liquid droplets and prolong the contact time between the two to complete the third dust removal and desulfurization. At the same time, the scraper 20 scrapes up the liquid on the cone 4 during the rotation process. The liquid first flows along the surface of the scraper 20 and is then thrown out to form splashes and water mist, which scatters in the shell 1 and contacts with the rising flue gas to complete the fourth dust removal and desulfurization. By analogy, the flue gas is constantly in contact with the alkaline water mist during the rising process to complete the dust removal and desulfurization. During operation, the utility model utilizes the inclined plate 9 and the wiper mechanism to make the alkaline liquid form splashes and water mist. Even if there are many impurities in the liquid, it can still operate normally, eliminating the use of traditional nozzles, fundamentally eliminating the blockage and damage problems caused by the use of nozzles, and the equipment no longer needs frequent maintenance and replacement, and can maintain long-term high-efficiency continuous operation, thereby improving the purification efficiency of flue gas; secondly, during the rising process of the flue gas, it has undergone several dust removal and desulfurization operations, and the flue gas is evenly distributed on the cross section of the shell 1. In addition, the flue gas is in a rotating flow state as a whole, which not only increases the contact area between the atomized droplets and the flue gas, but also prolongs the The contact time between the two improves the purification effect of the flue gas; finally, the alkaline cleaning liquid in the utility model is introduced into the shell 1 from the liquid inlet pipe 8 above each cone 4. As the liquid continues to converge, the amount of liquid is greater in the lower part of the shell 1, and more splashes and water mist are formed. The flue gas flows upward from the lower part of the shell 1. When it is at the bottom, the content of dust and sulfur-containing substances is the largest. With continuous purification, the content of dust and sulfur-containing substances is lower at the top. This operating mode ensures that during the flue gas purification process, the demand for alkaline cleaning liquid when the flue gas is located in various parts can be met, ensuring that the flue gas can be fully dust-removed, desulfurized and purified.
[0019] The lower part of the shell 1 is provided with a return pipe 12, on which a return pump is provided, and the shell 1 outside each cone 4 is provided with an annular pipe 13, the inner side of the annular pipe 13 is connected with the corresponding liquid inlet pipe 8, and the outer side of the annular pipe 13 is connected with the return pipe 12. It is known from practice that the alkaline cleaning liquid falls from the upper part of the shell 1, and during the falling process, it continuously contacts with the flue gas, desulfurizes and dusts the flue gas, and finally falls to the bottom of the shell 1. The alkaline cleaning liquid after falling can often still react with sulfur-containing substances, and direct discharge will undoubtedly cause waste. In order to improve the utilization rate of the alkaline cleaning liquid, the return pump and the return pipe 12 are used to return it to the upper part of the shell 1 for continued use, thereby reducing the cost of flue gas purification.
[0020] A high temperature resistant dust collector 14 is provided on the flue gas inlet pipe 11, and a dehumidifier 15 is provided on the top of the housing 1. The high temperature resistant dust collector 14 is a prior art, and a high temperature resistant dust removal structure such as a cyclone dust collector and a gravity dust collector can be used to remove large particles of dust and impurities in the flue gas, reduce the load of subsequent desulfurization and dust removal equipment, and improve the efficiency of flue gas desulfurization and dust removal. The dehumidifier 15 is an existing dehumidification structure, which is used to remove excess moisture in the flue gas, which not only prevents the waste of water resources, but also prevents the surrounding environment from being polluted.
[0021] An aerator 16 is arranged in the housing 1 below the inclined plate 9, and the end of the flue gas inlet pipe 11 is extended into the housing 1 and connected to the inlet end of the aerator 16. The aerator 16 is an existing device, which can evenly distribute the flue gas so that the flue gas can be evenly distributed in the cross section of the housing 1, thereby increasing the contact area between the flue gas and the alkaline cleaning liquid and improving the flue gas purification efficiency.
[0022] An annular water-stripping plate 17 with a concave middle part is arranged on the rotating shaft 2 between the adjacent wiper mechanism and the air-equalizing mechanism, and an inner extension pipe 18 is arranged on the side wall of the housing 1, and the end of the inner extension pipe 18 is inserted into the housing 1 and is located above the annular water-stripping plate 17. The annular water-stripping plate 17 is fixed on the rotating shaft 2, and rotates with the rotating shaft 2 during operation. The alkaline cleaning liquid passes into the housing 1 through the inner extension pipe 18, and falls on the annular water-stripping plate 17 from its end. Since the middle part of the annular water-stripping plate 17 is concave, it has a certain water storage capacity. When the annular water-stripping plate 17 rotates with the rotating shaft 2, due to the action of centrifugal force, the liquid on the annular water-stripping plate 17 is thrown around, so that the alkaline cleaning liquid is continuously thrown out to form a water curtain, and the flue gas will pass through the water curtain during the rising process, and the dust and sulfur-containing substances in the flue gas will contact with the liquid in the water curtain, thereby improving the dust removal and desulfurization efficiency of the dust and sulfur-containing substances in the flue gas.
[0023] The lower part of the rotating shaft 2 is connected to an anti-sway bar 19 through a bearing, and the end of the anti-sway bar 19 is fixedly connected to the side wall of the shell 1. Since the rotating shaft 2 is long and its lower end is suspended, it may shake during use, which will not only affect the flue gas dust removal and desulfurization work, but also easily cause the rotating shaft 2 to deform or even break. In order to avoid this problem as much as possible, an anti-sway bar 19 is provided to position and limit the lower part of the rotating shaft 2, ensuring that the rotating shaft 2 can always be coaxial with the shell 1, thereby improving the service life of the rotating shaft 2.
[0024] When the utility model is in operation, impurities such as dust and sulfur-containing substances in the flue gas are absorbed by the alkaline cleaning liquid and continuously accumulate at the bottom of the shell 1. Due to the stirring of the alkaline cleaning liquid by the inclined plate 9 and the stirring of the alkaline cleaning liquid by the flue gas passing into it, impurities such as dust cannot be effectively precipitated. The presence of a large amount of impurities reduces the purification effect of the alkaline cleaning liquid on the flue gas when it is recycled. In order to avoid this problem, a baffle plate can be arranged in the shell 1 below the flue gas inlet pipe 11, and a gap is reserved between the baffle plate and the side wall of the shell 1 to ensure the circulation of the liquid. In this way, the liquid above the baffle plate is in a stirring and flowing state, which is convenient for the absorption of dust and sulfur-containing substances in the flue gas, and the liquid below the baffle plate is in a relatively static state, which is convenient for the precipitation of impurities such as dust. At the same time, in order to prevent the sediment from accumulating on the baffle plate, the baffle plate can be arranged at an angle.
Claims
1. A carbonization furnace flue gas desulfurization and dust removal purification system, comprising a housing (1) and an exhaust port arranged at the top of the housing (1), characterized in that A rotating shaft (2) is arranged on the vertical center line in the shell (1), and the upper end of the rotating shaft (2) extends out of the top of the shell (1) and is connected to a driving device. A wiper mechanism and an air equalization mechanism are arranged alternately from top to bottom on the rotating shaft (2) in the shell (1), and the wiper mechanism includes a plurality of connecting rods (3) uniformly distributed around the circumference, and a scraper (20) is arranged at the end of the connecting rod (3). A cone (4) is arranged on the side wall of the shell (1), and the small end of the cone (4) is suspended downward, and the lower end surface of the scraper (20) coincides with the upper surface of the corresponding cone (4), and the plate surface of the scraper (20) is relatively The upper surface of the cone (4) is arranged inclined, and the gas equalization mechanism comprises a perforated plate (5) and an upper gas pipe (6) arranged on each opening of the perforated plate (5); a baffle (7) is arranged above the upper gas pipe (6) through a connecting plate; an annular gap is formed between the perforated plate (5) and the side wall of the shell (1); a plurality of liquid inlet pipes (8) are evenly distributed on the circumference of the side wall of the shell (1) above each cone (4); a plurality of inclined plates (9) are evenly distributed on the circumference of the lower end of the rotating shaft (2); a short cylinder (10) is arranged at the outer end of the inclined plate (9); and a smoke inlet pipe (11) is arranged on the side wall of the shell (1) below the short cylinder (10).
2. A carbonization furnace flue gas desulfurization and dust removal purification system according to claim 1, characterized in that A return pipe (12) is provided at the lower part of the shell (1), and a return pump is provided on the return pipe (12). An annular pipe (13) is provided on the shell (1) outside each cone (4), and the inner side of the annular pipe (13) is connected to the corresponding liquid inlet pipe (8), and the outer side of the annular pipe (13) is connected to the return pipe (12).
3. A carbonization furnace flue gas desulfurization and dust removal purification system according to claim 1, characterized in that A high temperature resistant dust collector (14) is provided on the flue gas inlet pipe (11), and a dehumidifier (15) is provided on the top of the shell (1).
4. A carbonization furnace flue gas desulfurization and dust removal purification system according to claim 1, characterized in that An aerator (16) is arranged in the shell (1) below the inclined plate (9), and the end of the smoke inlet pipe (11) extends into the shell (1) and is connected to the inlet end of the aerator (16).
5. A carbonization furnace flue gas desulfurization and dust removal purification system according to claim 1, characterized in that An annular water-spinning plate (17) with a concave center is arranged on the rotating shaft (2) between the adjacent wiper mechanisms and the air-equalizing mechanism, and an inner extension tube (18) is arranged on the side wall of the housing (1), and the end of the inner extension tube (18) is inserted into the housing (1) and is located above the annular water-spinning plate (17).
6. A carbonization furnace flue gas desulfurization and dust removal purification system according to claim 1, characterized in that The lower part of the rotating shaft (2) is connected to an anti-sway bar (19) via a bearing, and the end of the anti-sway bar (19) is fixedly connected to the side wall of the housing (1).