Purification tower and flue gas deep purification system

Abstract

The utility model relates to the field of flue gas purification, in particular to a purification tower and a flue gas deep purification system. The purifying assembly is arranged in the tower body and is used for purifying the flue gas; wherein the purification assembly comprises a fixed cover and a set of conical covers, the conical covers are installed in the fixed cover, a set of through holes are formed in the conical covers, a set of discharge holes with trapezoidal front view sections are formed in one side of the fixed cover, and annular pipes installed in the fixed cover are arranged between the through holes and the discharge holes; a liquid discharge hole is formed in the inner wall of the annular pipe; double-covering type absorbent spraying is adopted, the contact effect of the flue gas and the absorbent is guaranteed, meanwhile, the flue gas flowing speed can be reduced, the reaction time of the flue gas and the absorbent is prolonged, and therefore the purification effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of flue gas purification, and in particular to a purification tower and a deep flue gas purification system. Background Technology

[0002] Waste gas purification mainly refers to the treatment of industrial waste gases generated in industrial sites, such as particulate matter, flue gas, odorous gases, and toxic and harmful gases. Common waste gas purification methods include factory flue gas purification, workshop dust gas purification, organic waste gas purification, waste gas odor purification, acid and alkali waste gas purification, and chemical waste gas purification. In the process of deep waste gas purification, purification towers are required.

[0003] In existing technologies, the flue gas purification process in purification towers often employs a combination of top spraying and a packing layer. However, this method has the following drawbacks in actual use: although it can prolong the flue gas flow velocity and ensure the contact effect between the flue gas and the absorbent, there is still a tendency for a small amount of flue gas to have a short contact time with the absorbent. Furthermore, the packing layer is prone to blockage during long-term use, increasing maintenance costs and affecting both the flue gas flow and the absorbent spraying effect, resulting in a severely insufficient contact effect between the flue gas and the absorbent.

[0004] Therefore, a purification tower and a deep flue gas purification system are proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a purification tower and a deep flue gas purification system to solve the above-mentioned problems, thereby improving the issues of short contact time between a small amount of flue gas and the absorbent and poor contact effect between flue gas and the absorbent.

[0006] This utility model achieves the above-mentioned objective through the following technical solution: a purification tower, including a tower body; and a purification component, wherein the purification component is disposed inside the tower body and is used to purify flue gas; wherein the purification component includes a fixed cover and a set of conical covers, the conical covers are installed inside the fixed cover, the conical covers have a set of through holes inside, the fixed cover has a set of discharge holes with a trapezoidal cross-section on one side, and an annular tube installed inside the fixed cover is disposed between the through holes and the discharge holes, the annular tube has a drain hole on its inner wall.

[0007] Preferably, the purification assembly further includes an annular nozzle and a cover nozzle. The cover nozzle has a cavity inside, one end of the annular nozzle extends into the cavity, and one side of the cover nozzle has a flared groove communicating with the cavity.

[0008] Preferably, a water pump is installed on the outside of the tower body, and a three-way pipe is installed at the output end of the water pump. The two ends of the three-way pipe away from the water pump are respectively connected to an annular pipe and a cavity.

[0009] Preferably, an air inlet pipe and an exhaust pipe extending into the tower body are respectively installed on the tower body, and the air inlet pipe, the annular nozzle and the cover nozzle are coaxially arranged.

[0010] This utility model also provides a deep flue gas purification system, including a purification tower, a spray cooling tower, an electrostatic precipitator, and a chemical tank demister. A gas guide pipe is provided between the spray cooling tower and the electrostatic precipitator, and another gas guide pipe is provided between the spray cooling tower and the tower body. A fan for driving the flue gas is installed on the gas guide pipe.

[0011] Preferably, a booster pump is provided on the outside of the medicine barrel, and a pipe is installed between the output end of the booster pump and the input end of the water pump.

[0012] Preferably, the demister is installed inside the tower body and is connected to one end of the exhaust pipe.

[0013] The beneficial effects of this utility model are:

[0014] 1. By setting a conical cover, the flue gas flows into the inside of the conical cover and then exits through the through hole. At this time, the drain hole in the annular pipe will continuously spray absorbent to form a horizontal water curtain. The sprayed absorbent will fall downward and then spread along the outer surface of the conical cover to form a fan-shaped water mist that comes into contact with the flue gas during the flow. This enveloping spray method increases the contact effect between the flue gas and the absorbent. Then, the flue gas that exits through the through hole will break through the horizontal water curtain and come into contact with the absorbent again. Throughout the process, the setting of the through hole and the discharge hole slows down the flow speed of the flue gas and increases the reaction time between the flue gas and the absorbent, thereby effectively improving the purification effect of the flue gas.

[0015] 2. By setting up annular nozzles and flared grooves, the absorbent is sprayed out in a ring shape by the annular nozzles and covers the outside of the air inlet pipe, providing the first layer of coverage for the flue gas. Subsequently, the flue gas can only continue to flow after breaking through the small annular water mist formed by the annular nozzles. In addition, with the setting of the flared grooves on the covering nozzles, a large annular water mist can be formed outside the small annular water mist, providing double-layer shielding for the flue gas during the flow process. After the flue gas breaks through the two layers of annular water mist, it comes into contact with the absorbent. This method effectively reduces the phenomenon of flue gas not coming into contact with the absorbent. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the system flow of this utility model;

[0017] Figure 2 This is a schematic diagram of the tower body of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the fixed cover and the annular nozzle of this utility model;

[0019] Figure 4 This is a cross-sectional structural diagram of the fixing cover and the discharge hole of this utility model;

[0020] Figure 5 This is a cross-sectional schematic diagram of the cavity and flared groove of this utility model.

[0021] In the diagram: 100, tower body; 110, water pump; 120, tee pipe; 130, air inlet pipe; 140, exhaust pipe; 200, purification component; 210, fixed cover; 211, discharge hole; 220, conical cover; 221, through hole; 230, annular pipe; 231, drain hole; 240, annular nozzle; 250, covering nozzle; 251, flared groove; 300, spray cooling tower; 400, electrostatic precipitator; 500, chemical tank; 600, demister. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In practical implementation: such as Figure 1-5 As shown, a purification tower includes a tower body 100 and a purification component 200, which is disposed inside the tower body 100 and used to purify flue gas. The purification component 200 includes a fixed cover 210 and a set of conical covers 220. The conical covers 220 are installed inside the fixed cover 210. A set of through holes 221 are opened inside the conical covers 220. A set of discharge holes 211 with a trapezoidal cross-section are opened on one side of the fixed cover 210. An annular pipe 230 installed inside the fixed cover 210 is disposed between the through holes 221 and the discharge holes 211. The inner wall of the annular pipe 230 is provided with a drain hole 231.

[0024] like Figure 3 and Figure 5 As shown, the purification assembly 200 also includes an annular nozzle 240 and a cover nozzle 250. The cover nozzle 250 has a cavity inside, one end of the annular nozzle 240 extends into the cavity, and a flared groove 251 communicating with the cavity is provided on one side of the cover nozzle 250.

[0025] After the flue gas is introduced into the tower body 100, the absorbent can be sprayed out in a ring shape using the annular nozzle 240 to provide the first layer of coverage for the flue gas. The flue gas must then pass through the small annular water mist formed by the annular nozzle 240 to continue flowing. Furthermore, the flared groove 251 on the covering nozzle 250 forms a large annular water mist outside the small annular water mist, providing double-layer shielding for the flue gas during its flow. After passing through both layers of annular water mist, the flue gas comes into contact with the absorbent, effectively reducing the phenomenon of flue gas not contacting the absorbent. The flue gas then flows upwards along the interior of the tower body 100, entering the fixed cover 210 during its flow, and then entering the conical cover 220. The gas is then discharged through the through hole 221. During this process, the drain hole 231 in the annular pipe 230 will continuously spray out absorbent, forming a horizontal water curtain. The sprayed absorbent will fall downwards and then spread along the outer surface of the conical cover 220, forming a fan-shaped water mist that comes into contact with the flue gas during the flow process, increasing the contact effect between the flue gas and the absorbent. At the same time, the through hole 221 is used to slow down the flow rate of the flue gas and increase the reaction time between the flue gas and the absorbent. Then, the flue gas discharged through the through hole 221 will break through the horizontal water curtain and come into contact with the absorbent again. Then it will be discharged through the discharge hole 211. The setting of the discharge hole 211 can control the overall flow rate of the flue gas to decrease, and increase the contact time and reaction time between the flue gas and the absorbent.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, a water pump 110 is installed on the outside of the tower body 100. A three-way pipe 120 is installed at the output end of the water pump 110. The two ends of the three-way pipe 120 away from the water pump 110 are connected to the annular pipe 230 and the cavity, respectively.

[0027] Start the water pump 110 to introduce the absorbent along the tee pipe 120 into the annular pipe 230 and the cavity, and complete the absorbent spraying operation in different areas.

[0028] like Figure 2 and Figure 3 As shown, an air inlet pipe 130 and an exhaust pipe 140 extending into the tower body 100 are respectively installed on the tower body 100. The air inlet pipe 130, the annular nozzle 240 and the cover nozzle 250 are coaxially arranged.

[0029] The intake pipe 130 and exhaust pipe 140 are used to complete the introduction and export of flue gas on the tower body 100.

[0030] This utility model also provides a deep flue gas purification system, including a purification tower, a spray cooling tower 300, an electrostatic precipitator 400, a chemical tank 500, and a demister 600. A duct is provided between the spray cooling tower 300 and the electrostatic precipitator 400, and a duct is also provided between the spray cooling tower 300 and the tower body 100. A fan for driving the flue gas is installed on the duct.

[0031] An electrostatic precipitator 400 is used to pre-collect particulate matter in the flue gas. Then, a spray cooling tower 300 is used to settle the particulate matter in the flue gas and reduce the flue gas temperature. The cooled flue gas is then introduced into the tower body 100 for purification. Throughout the process, a corresponding fan and air guide pipe are used to drive the flue gas transportation.

[0032] like Figure 1 As shown, a booster pump is installed on the outside of the medicine barrel 500, and a pipe is installed between the output end of the booster pump and the input end of the water pump 110.

[0033] The absorbent in the 500-ton tank is discharged through the corresponding pipeline using a booster pump to complete the absorbent spraying operation.

[0034] like Figure 1 As shown, the demister 600 is installed inside the tower body 100, and the demister 600 is connected to one end of the exhaust pipe 140.

[0035] The demister 600 is used to remove liquid droplets and mist carried on the purified flue gas, preventing liquid from entering subsequent equipment.

[0036] Working principle: After the flue gas is introduced into the tower body 100, the absorbent is sprayed out in a ring shape using the annular nozzle 240, providing the first layer of coverage for the flue gas. The flue gas then needs to pass through the small annular water mist formed by the annular nozzle 240 to continue flowing. Furthermore, the flared groove 251 on the covering nozzle 250 forms a large annular water mist outside the small annular water mist, providing double-layer coverage for the flue gas during its flow. After passing through both layers of annular water mist, the flue gas comes into contact with the absorbent, effectively reducing the phenomenon of flue gas not contacting the absorbent. The flue gas then flows upwards along the interior of the tower body 100, entering the fixed cover 210 during its flow, then entering the conical cover 220, and finally exiting through the through hole 221. During this process, the drain hole 2 in the annular pipe 230... 31 continuously sprays absorbent, forming a horizontal water curtain. The sprayed absorbent falls downwards and then diffuses along the outer surface of the conical cover 220, forming a fan-shaped water mist that contacts the flue gas during its flow, increasing the contact effect between the flue gas and the absorbent. At the same time, the through-hole 221 slows down the flow velocity of the flue gas, increasing the reaction time between the flue gas and the absorbent. Then, the flue gas discharged through the through-hole 221 breaks through the horizontal water curtain and contacts the absorbent again before being discharged through the discharge hole 211. The discharge hole 211 controls the overall flow velocity of the flue gas to decrease, increasing the contact time and reaction time between the flue gas and the absorbent. The entire device uses a double-coverage absorbent spray to ensure the contact effect between the flue gas and the absorbent, while reducing the flow velocity of the flue gas and increasing the reaction time between the flue gas and the absorbent, thereby improving the purification effect.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A purification tower characterized by, include: Tower(100); It also includes a purification component (200), which is disposed inside the tower body (100) and is used to purify the flue gas; The purification component (200) includes a fixed cover (210) and a set of conical covers (220). The conical covers (220) are installed inside the fixed cover (210). A set of through holes (221) are opened inside the conical covers (220). A set of discharge holes (211) with a trapezoidal cross-section are opened on one side of the fixed cover (210). An annular tube (230) installed inside the fixed cover (210) is provided between the through holes (221) and the discharge holes (211). A drain hole (231) is opened on the inner wall of the annular tube (230).

2. A purification tower according to claim 1, characterized in that: The purification component (200) also includes an annular nozzle (240) and a cover nozzle (250). The cover nozzle (250) has a cavity inside. One end of the annular nozzle (240) extends into the cavity. The cover nozzle (250) has a flared groove (251) communicating with the cavity on one side.

3. A purification tower according to claim 1, characterized in that: A water pump (110) is installed on the outside of the tower body (100). A three-way pipe (120) is installed at the output end of the water pump (110). The two ends of the three-way pipe (120) away from the water pump (110) are respectively connected to the annular pipe (230) and the cavity.

4. A purification tower according to claim 1, characterized in that: The tower body (100) is equipped with an air inlet pipe (130) and an exhaust pipe (140) extending into it, and the air inlet pipe (130), the annular nozzle (240) and the cover nozzle (250) are coaxially arranged.

5. A flue gas deep cleaning system comprising the cleaning tower of any one of claims 1-4, further comprising a spray cooling tower (300), an electrostatic precipitator (400), a chemical tank (500), and a mist eliminator (600), characterized in that: An air guide pipe is provided between the spray cooling tower (300) and the electrostatic precipitator (400), and an air guide pipe is also provided between the spray cooling tower (300) and the tower body (100). A fan for driving flue gas is installed on the air guide pipe.

6. A flue gas deep cleaning system according to claim 5, characterised in that: A booster pump is installed on the outside of the medicine barrel (500), and a pipe is installed between the output end of the booster pump and the input end of the water pump (110).

7. A flue gas deep cleaning system according to claim 5, wherein: The demister (600) is installed inside the tower body (100) and is connected to one end of the exhaust pipe (140).

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