An exhaust gas treatment tower

Abstract

The utility model relates to waste gas treatment technical field, and disclose a kind of waste gas treatment tower, comprising: cylinder, the lower part of cylinder is provided with skirt cylinder, the lower end of skirt cylinder is provided with base ring plate, the bottom of cylinder is provided with lower head, pipeline one is communicated and is provided with in lower head bottom, the other end of pipeline one is fixed in skirt cylinder side edge, the above of lower head is provided with exhaust pipe type distributor, the left side of exhaust pipe type distributor is provided with gas phase inlet, the above of exhaust pipe type distributor is provided with grid, multiple groups of square saddle ring are filled in grid, the above of square saddle ring is provided with packing gland, the above of packing gland is provided with multiple groups of groove disc type distributor, the above of groove disc type distributor is provided with upper head, the top of upper head is provided with tower top gas phase outlet;Groove disc type distributor is designed by rectangular groove body collocation flow guide hole, can realize liquid phase medium uniform spraying, and mass transfer efficiency is improved compared with traditional packing tower.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically a waste gas treatment tower. Background Technology

[0002] In industrial production, waste gas treatment towers, as core equipment for gas-liquid mass transfer, are widely used in chemical, metallurgical, and coating industries. Their core function is to absorb and purify pollutants through gas-liquid contact. Traditional tower types rely on internal components such as packing layers and distributors to optimize mass transfer efficiency. However, with increasingly stringent environmental standards, higher demands are placed on the equipment's processing efficiency, adaptability, and ease of maintenance. Nevertheless, existing technologies have significant shortcomings in structural design and functional integration, which urgently require breakthroughs.

[0003] Chinese patent CN106237823B discloses a waste gas treatment tower that employs a complex combination structure of concentric ring pipes, cross-shaped straight pipes, and toothed downcomers. While it achieves the function of ionic liquid desulfurization, it has certain limitations: The variety of irregularly shaped pipe fittings and precision-fitting components result in high requirements for processing accuracy, complicated welding and assembly processes, increased manufacturing costs compared to conventional tower types, and easy damage and difficulty in replacing parts.

[0004] This method tightly integrates absorption, distribution, heat exchange, and defoaming functions into a single tower, relying on specific process parameters and only suitable for ion-liquid desulfurization scenarios. When handling acidic gases, VOCs, or alkaline scrubbing processes, the internal layout needs to be redesigned, resulting in poor versatility. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a waste gas treatment tower.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A waste gas treatment tower includes: a cylindrical body, a skirted cylindrical body at the lower part of the cylindrical body, a foundation ring plate at the lower end of the skirted cylindrical body, anchor bolts evenly arranged and fixed along the circumference of the foundation ring plate, a lower end cap at the bottom of the cylindrical body, a pipe connected to the bottom of the lower end cap, the other end of the pipe fixed to the side of the skirted cylindrical body, a pipe-type distributor above the lower end cap, a gas phase inlet on the left side of the pipe-type distributor, a grid plate above the pipe-type distributor, multiple sets of rectangular saddle rings packed on the grid plate, a packing gland above the rectangular saddle rings, multiple sets of slotted plate distributors above the packing gland, an upper end cap above the slotted plate distributor, and a tower top gas phase outlet at the top of the upper end cap. The base ring plate is used to fix the skirt support cylinder to the ground with anchor bolts. One end of the pipe fixed to the side of the skirt support cylinder is set as the bottom liquid phase outlet. The left side of the upper end cap is provided with the top liquid phase inlet through the pipe. The pipe-type distributor is used to evenly distribute the waste gas to be treated introduced from the gas phase inlet to the lower area of ​​the tower, guide the gas phase medium to flow steadily upward, and provide a uniform airflow foundation for gas-liquid contact. The rectangular saddle ring is used to increase the contact area between the gas phase medium and the liquid phase medium, prolong the contact time, and promote the absorption of target pollutants in the waste gas by the liquid phase. The tray-type distributor is used to evenly spray the liquid phase medium introduced from the top liquid phase inlet of the tower onto the surface of the packing layer, ensuring that the packing layer is fully wetted, avoiding dry areas, and ensuring the uniformity of gas-liquid contact.

[0007] Preferably, manholes are provided on the sides of both the upper and lower end caps. The manholes are used by operators to enter the tower for inspection, component replacement, internal cleaning and equipment assembly, providing an operating passage for tower maintenance.

[0008] Preferably, the lower side of the skirt support cylinder is provided with multiple sets of inspection holes, which are used to observe the fixing status and corrosion of the foundation ring plate and anchor bolts.

[0009] Preferably, the top of the upper head is provided with a temperature indicator port, a differential pressure indicator port and a spare port at the top of the tower, and the side of the cylinder is also provided with a level gauge interface and a level control port. The side of the upper head is fixed with a tower top hanging column by sheet metal parts. The temperature indicator port is used to install temperature detection elements to monitor the gas phase temperature at the top of the tower in real time. The differential pressure indicator port is used to install differential pressure detection devices to monitor the pressure difference between the upper and lower sections of the tower. The spare port at the top of the tower is reserved for sampling, gas replenishment, or emergency treatment. The level gauge interface is used to install level detection instruments. The level control port is used to connect to the level control device to jointly achieve the monitoring and stable control of the liquid phase level at the bottom of the tower. The tower top lifting column is used for the hoisting and disassembly of internal components.

[0010] Preferably, the anchor bolts are provided with stiffening plates on the outside and cover plates and washers on the top.

[0011] Compared with the prior art, the present invention provides a waste gas treatment tower with the following advantages: The tray-type distributor, with its rectangular tray and guide hole design, can achieve uniform spraying of liquid media and has improved resistance to solid particle clogging compared to the fixed orifice plate distributor, ensuring uniform gas-liquid contact.

[0012] The rectangular saddle ring packing supported by the grid plate is arranged in a random stack to avoid packing damage under high gas velocity, while reserving a certain expansion gap to adapt to the stability of the packing layer under temperature changes, thus improving the mass transfer efficiency compared to traditional packed towers.

[0013] The tower internals are designed in a three-level modular manner, consisting of gas phase distribution, packing mass transfer, and liquid phase distribution. By reducing complex irregular parts, the number of components is greatly reduced compared to the CN106237823B patent, which shortens processing time and reduces manufacturing costs. Attached Figure Description

[0014] Figure 1 This is a frontal planar structural diagram of the present invention; Figure 2 This is a top view schematic diagram of the structure of this utility model; Figure 3 This utility model Figure 1 A magnified planar structural diagram at point A.

[0015] The components are as follows: 1. Shell; 101. Manhole; 2. Lower head; 205. Upper head; 201. Bottom liquid outlet; 202. Pipeline 1; 203. Inspection hole; 204. Skirt-supported shell; 3. Gas inlet; 301. Pipeline distributor; 4. Rectangular saddle ring; 401. Packing gland; 402. Grid plate; 501. Top liquid inlet; 502. Differential pressure indicator port; 503. Top spare port; 504. Top support column; 505. Top gas outlet; 506. Tray distributor; 509. Temperature indicator port; 507. Liquid level control port; 508. Liquid level gauge interface; 601. Foundation ring plate; 602. Anchor bolts; 603. Cover plate; 604. Pad plate; 605. Rib plate. Detailed Implementation

[0016] 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.

[0017] Reference Figures 1-3 As shown, a waste gas treatment tower according to this embodiment includes a cylindrical body 1. A skirt support cylindrical body 204 is fixedly installed at the lower part of the cylindrical body 1. This fixed connection method ensures the stability of the lower structure of the tower body and provides reliable support for the overall equipment. The lower end of the skirt support cylindrical body 204 is fixedly connected to a foundation ring plate 601. Anchor bolts 602 are evenly arranged circumferentially on the foundation ring plate 601. The anchor bolts 602 are fixedly installed with the foundation ring plate 601. The overall fixation of the tower body is achieved through the tight fit with the ground, avoiding displacement during operation.

[0018] The bottom of the cylinder 1 is provided with a lower end cap 2, which is sealed to the cylinder 1 to ensure the sealing of the bottom of the tower and prevent leakage of liquid medium. The bottom of the lower end cap 2 is connected to a pipe 202, the other end of which is fixed to the side of the skirt cylinder 204, and its end is set as the bottom liquid outlet 201. This connection method ensures smooth discharge of liquid medium, while the skirt cylinder 204 enhances the support strength of the pipe.

[0019] A pipe-type distributor 301 is fixedly installed above the lower end cap 2. A gas inlet 3 is located on the left side of the pipe-type distributor 301, and the gas inlet 3 is connected to the pipe-type distributor 301. This structural design allows the waste gas to be treated to directly enter the interior of the distributor and be evenly dispersed to the lower area of ​​the tower body through the openings of the pipe-type distributor 301, laying the foundation for gas-liquid contact. A grid plate 402 is installed above the pipe-type distributor 301. The grid plate 402 is fixedly connected to the inner wall of the cylinder 1. Multiple sets of rectangular saddle rings 4 are packed on the grid plate 402. The rectangular saddle rings 4 are randomly arranged to make full use of the space inside the tower and increase the gas-liquid contact area.

[0020] A packing gland 401 is installed above the rectangular saddle ring 4. The packing gland 401 is movably connected to the inner wall of the cylinder 1, which not only restricts the displacement of the rectangular saddle ring 4 but also reserves a certain expansion gap to adapt to the influence of temperature changes on the packing layer. Multiple sets of grooved disc distributors 506 are fixedly installed above the packing gland 401. An upper end cap 205 is positioned above the grooved disc distributor 506 and is sealed to the cylinder 1. The upper end cap 205 has a top gas phase outlet 505 at its top and a top liquid phase inlet 501 on its left side via a connecting pipe. The top liquid phase inlet 501 communicates with the grooved disc distributor 506 to ensure that the liquid medium is uniformly sprayed onto the surface of the packing layer, achieving efficient gas-liquid mass transfer.

[0021] In some examples, manholes 101 are provided on the sides of both the upper head 205 and the lower head 2. The manholes 101 are sealed to the heads, providing operators with access to the tower, facilitating maintenance, component replacement, internal cleaning and equipment assembly, and reducing maintenance difficulty.

[0022] In some examples, the lower side of the skirt support cylinder 204 is provided with multiple sets of inspection holes 203. The inspection holes 203 adopt a sealed viewing window structure, allowing operators to observe the fixing status and corrosion of the foundation ring plate 601 and anchor bolts 602 without disassembling the parts, and promptly detect potential safety hazards.

[0023] In some examples, the top of the upper head 205 is equipped with a temperature indicator port 509, a differential pressure indicator port 502, and a spare port 503 at the top of the column. The side of the cylinder 1 is also equipped with a level gauge interface 508 and a level control port 507. These interfaces are all connected by standard flanges, which facilitates the installation of detection elements and control devices, enabling real-time monitoring and stable control of parameters such as the top temperature, internal pressure difference, and bottom liquid level of the column.

[0024] In some examples, the upper end cap 205 is fixedly mounted with a tower top lifting column 504 by sheet metal parts. The load-bearing capacity of the tower top lifting column 504 matches the weight of the internal components of the tower. Its fixing method ensures the structural stability during the hoisting process and provides safe and convenient operating conditions for the hoisting and disassembly of the internal components of the tower.

[0025] In some examples, a stiffening plate 605 is provided on the outside of the anchor bolt 602. The stiffening plate 605 is fixedly connected to the anchor bolt 602 and the foundation ring plate 601 respectively, which can enhance the shear resistance of the anchor bolt 602 and prevent the bolt from loosening or deforming due to tower vibration during long-term use.

[0026] In some examples, the upper part of the anchor bolt 602 is provided with a cover plate 603 and a washer plate 604. The washer plate 604 is placed between the anchor bolt 602 and the foundation ring plate 601 to distribute the pressure when the bolt is tightened. The cover plate 603 can protect the top of the anchor bolt 602 and prevent dust and moisture from entering and causing corrosion.

[0027] The working principle of this utility model is as follows: When using this new type of waste gas treatment tower, firstly, select a flat installation site according to the actual treatment scenario, place the foundation ring plate 601 stably, and fix the skirt base cylinder 204 to the ground using anchor bolts 602. The stiffening plates 605 on the outside of the anchor bolts 602 enhance shear resistance, the upper pad plate 604 disperses the tightening pressure, and the cover plate 603 protects the bolts from corrosion. This multi-layer structure ensures the overall stability of the tower installation and prevents displacement during operation. Next, complete the assembly of the tower internals in sequence: fix the pipe-type distributor 301 above the lower end cap 2, install the grid plate 402 above the pipe-type distributor 301 and level it, randomly arrange multiple sets of rectangular saddle rings 4 on the grid plate 402, then cover the rectangular saddle rings 401 with the packing gland 401, and finally fix multiple sets of grooved plate distributors 506. Meanwhile, a temperature detection element is installed at the temperature indicator port 509, a differential pressure detection device is installed at the differential pressure indicator port 502, the level gauge interface 508 and the level control port 507 are respectively connected to the level detection instrument and the control device, and the tower top hanging column 504 is fixed to the side of the lower end cap 205 by sheet metal parts, which provides convenience for subsequent maintenance.

[0028] During normal operation, the operator can activate the gas-liquid conveying system. The waste gas to be treated enters the tower through the gas inlet 3 and is evenly dispersed by the axial piping and radial perforation structure of the pipe-type distributor 301, guiding the gaseous medium to flow stably upwards in the lower region of the tower, ensuring minimal deviation in airflow velocity across the tower cross-section. Simultaneously, the absorbent is injected from the liquid inlet 501 at the top of the tower and evenly sprayed through the rectangular trough and guide holes of the tray-type distributor 506, forming dense spray points to fully wet the packing layer composed of the rectangular saddle rings 4, preventing dry zones. The waste gas passes through the packing layer from bottom to top, forming a counter-current contact with the absorbent flowing from top to bottom. The high specific surface area and random arrangement of the rectangular saddle rings 4 significantly increase the gas-liquid contact area and extend the contact time, promoting physical absorption or chemical reaction between the target pollutants in the waste gas and the absorbent. The purified gas continues to rise and is discharged from the top gas outlet 505 at the top of the upper head 205; the liquid medium that has absorbed pollutants collects at the lower head 2 and is discharged from the bottom liquid outlet 201 through pipeline 202, which can be recycled or further processed. During operation, parameters such as temperature, pressure difference, and liquid level are monitored in real time by corresponding detection devices to ensure that the equipment operates stably under optimal conditions.

[0029] When encountering special circumstances such as fluctuations in absorbent supply or changes in waste gas composition, the modular design and high operational flexibility of the equipment ensure treatment effectiveness. The anti-clogging structure of the tray-type distributor 506 can adapt to absorbents containing a small amount of solid particles, avoiding clogging that affects the spraying effect; the expansion gap reserved in the rectangular saddle ring 4 can cope with temperature changes and prevent damage to the packing layer; the spare port 503 at the top of the tower can be used as a temporary sampling port or gas replenishment port to adjust the operating conditions inside the tower in a timely manner. If local clogging or a decrease in mass transfer efficiency occurs, the tower can be accessed for maintenance through the manholes 101 on the sides of the upper end cap 205 and the lower end cap 2 without disassembling the entire tower, ensuring the continuity of treatment operations.

[0030] When maintenance is required after a period of exhaust gas treatment, thanks to the modular design, internal components such as the tray-type distributor 506 and the rectangular saddle ring 4 can be easily hoisted and disassembled via the tower top lifting column 504 for cleaning, replacement, or maintenance. Operators can also directly observe the fixing status and corrosion of the foundation ring plate 601 and anchor bolts 602 through the inspection hole 203 at the bottom of the skirt base cylinder 204, and take timely protective measures.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste gas treatment tower, characterized in that, include: A cylindrical body (1) is provided at the lower part of the cylindrical body (1), and a skirted cylindrical body (204) is provided at the lower end of the skirted cylindrical body (204). Anchor bolts (602) are evenly arranged and fixed on the foundation ring plate (601) along the circumference. A lower end cap (2) is provided at the bottom of the cylindrical body (1). A pipe (202) is connected to the bottom of the lower end cap (2). The other end of the pipe (202) is fixed to the side of the skirted cylindrical body (204). A pipe-type distributor (301) is provided above the lower end cap (2). A gas inlet (3) is provided on the left side of the pipe-type distributor (301). A grid plate (402) is provided above the pipe-type distributor (301). Multiple sets of rectangular saddle rings (4) are packed on the grid plate (402). A packing gland (401) is provided above the rectangular saddle rings (4). Multiple sets of slotted plate distributors (506) are provided above the packing gland (401). An upper end cap (205) is provided above the slotted plate distributor (506). A tower top gas outlet (505) is provided at the top of the upper end cap (205). The base ring plate is used to fix the skirt support cylinder (204) to the ground by anchor bolts (602). One end of the pipe (202) fixed to the side of the skirt support cylinder (204) is set as the bottom liquid phase outlet (201). The left side of the upper end cap (205) is provided with the top liquid phase inlet (501) through the pipe. The pipe-type distributor (301) is used to evenly distribute the waste gas to be treated introduced from the gas phase inlet (3) to the lower area of ​​the tower body, guide the gas phase medium to flow steadily upward, and provide a uniform airflow basis for gas-liquid contact. The rectangular saddle ring (4) is used to increase the contact area between the gas phase medium and the liquid phase medium, prolong the contact time, and promote the absorption of target pollutants in the waste gas by the liquid phase. The tray-type distributor (506) is used to evenly spray the liquid phase medium introduced from the top liquid phase inlet (501) onto the surface of the packing layer, ensure that the packing layer is fully wetted, avoid the occurrence of dry areas, and ensure the uniformity of gas-liquid contact.

2. The waste gas treatment tower according to claim 1, characterized in that, Manholes (101) are provided on the sides of both the upper end cap (205) and the lower end cap (2). The manholes (101) are used for operators to enter the tower for maintenance, component replacement, internal cleaning and equipment assembly, providing an operating passage for tower maintenance.

3. The waste gas treatment tower according to claim 1, characterized in that, The lower side of the skirt base cylinder (204) is provided with multiple sets of inspection holes (203). The inspection holes (203) are used to observe the fixing status and corrosion of the foundation ring plate (601) and anchor bolts (602).

4. The waste gas treatment tower according to claim 1, characterized in that, The top of the upper head (205) is provided with a temperature indicator port (509), a differential pressure indicator port (502) and a spare port at the top of the tower (503). The side of the cylinder (1) is also provided with a level gauge interface (508) and a level control port (507). The side of the upper head (205) is fixed with a tower top hanging column (504) by sheet metal parts. The temperature indicator port (509) is used to install temperature detection elements to monitor the gas phase temperature at the top of the tower in real time. The differential pressure indicator port (502) is used to install differential pressure detection devices to monitor the pressure difference between the upper and lower sections of the tower. The spare port at the top of the tower (503) is used to reserve interfaces for sampling, gas replenishment, or emergency treatment. The level gauge interface (508) is used to install level detection instruments. The level control port (507) is used to connect level control devices to jointly realize the monitoring and stable control of the liquid phase level at the bottom of the tower. The tower top lifting column (504) is used for the hoisting and disassembly of internal components of the tower.

5. The waste gas treatment tower according to claim 1, characterized in that, Anchor bolt (602) is provided with a stiffening plate (605) on the outside, and a cover plate (603) and a washer plate (604) are provided on the upper part of anchor bolt (602).

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