Vertical honeycomb molecular sieve adsorption bed

Abstract

The utility model discloses a vertical honeycomb molecular sieve adsorption bed which comprises a molecular sieve adsorption bed shell, and the upper part of the molecular sieve adsorption bed shell is provided with an adsorption gas inlet, a desorption gas outlet pipe, an upper thermocouple joint, an upper differential pressure gauge joint and a carbon dioxide nozzle; an adsorption gas outlet, a desorption gas inlet pipe, a lower thermocouple joint and a lower differential pressure gauge joint are arranged at the lower part of the molecular sieve adsorption bed shell; a grating frame is arranged in an inner cavity of the molecular sieve adsorption bed shell, framework supporting pieces fixedly connected with the molecular sieve adsorption bed shell are uniformly arranged at the bottom of the grating frame, gratings are uniformly arranged on the grating frame, and honeycomb molecular sieves are placed on the gratings; a honeycomb molecular sieve adsorption bed is changed into internal heat preservation, and heat loss is reduced. A flow guide plate is additionally arranged at a desorption air inlet of the honeycomb molecular sieve adsorption bed, so that uniform air distribution and thorough high-temperature desorption regeneration are ensured. Right-angle clamping blocks are additionally arranged on the grille supporting seats, the four corners of the grille are clamped, and the grille is stable and does not shift or turn on one side.

Description

Technical Field

[0001] This utility model relates to the field of organic waste gas treatment technology, specifically a vertical honeycomb molecular sieve adsorption bed. Background Technology

[0002] Organic waste gas is one of the main pollutants emitted from industrial production (such as petrochemicals, spraying, printing, and pharmaceuticals). It is toxic, flammable, and explosive, and some VOCs (such as benzene compounds and formaldehyde) are carcinogenic. Traditional VOCs treatment technologies (such as activated carbon adsorption, combustion, and biological methods) have problems such as low adsorption capacity, high energy consumption, and secondary pollution. However, honeycomb molecular sieve adsorption beds have become a research hotspot for VOCs treatment in recent years due to their advantages such as high adsorption efficiency, low resistance, and easy regeneration.

[0003] Features and advantages of honeycomb molecular sieves: They possess a regular honeycomb-like pore structure, resulting in low airflow resistance and uniform airflow distribution. Their large specific surface area provides numerous adsorption sites, leading to high adsorption efficiency for organic waste gases. Furthermore, this structure ensures a large contact area and relatively stable contact time between the waste gas and the molecular sieve, further enhancing the adsorption effect.

[0004] Existing honeycomb molecular sieve adsorption beds use external insulation, which has the disadvantage that heat can still be lost through the metal shell. Honeycomb molecular sieve adsorption beds also suffer from uneven airflow distribution. Furthermore, the grid supporting the molecular sieves is pieced together in sections, and the support base lacks locking grooves, leading to instability and safety hazards during maintenance.

[0005] Based on this, the present invention designs a vertical honeycomb molecular sieve adsorption bed to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a vertical honeycomb molecular sieve adsorption bed to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a vertical honeycomb molecular sieve adsorption bed, comprising a molecular sieve adsorption bed shell, wherein the upper part of the molecular sieve adsorption bed shell is provided with an adsorption inlet, a desorption outlet pipe, an upper thermocouple connector, an upper differential pressure gauge connector, and a carbon dioxide nozzle; the lower part of the molecular sieve adsorption bed shell is provided with an adsorption outlet, a desorption inlet pipe, a lower thermocouple connector, and a lower differential pressure gauge connector; the inner cavity of the molecular sieve adsorption bed shell is provided with a grid frame, and the bottom of the grid frame is uniformly provided with skeleton support members that are connected and fixed to the molecular sieve adsorption bed shell; the grid is uniformly provided on the grid frame, and a honeycomb molecular sieve is placed on the grid.

[0008] Preferably, the inner wall of the molecular sieve adsorption bed shell is provided with a heat insulation layer, the thickness of which is 120mm-180mm.

[0009] Preferably, the molecular sieve adsorption bed shell has a vertical cuboid shape in the middle and conical shapes at the top and bottom ends.

[0010] Preferably, a safety vent is provided on the upper side wall of the molecular sieve adsorption bed shell, and an explosion-proof diaphragm is installed inside the safety vent.

[0011] Preferably, the upper and lower parts of the molecular sieve adsorption bed shell are respectively provided with an upper inspection port and a lower inspection port.

[0012] Preferably, right-angled clips for positioning the grille are installed at the corners of the grille frame.

[0013] Preferably, the skeleton support is fixed to the molecular sieve adsorption bed shell by bolts, and a heat insulation pad is provided at the connection between the skeleton support and the molecular sieve adsorption bed shell.

[0014] Preferably, the air inlet of the desorption air inlet pipe 3 is funnel-shaped, and guide plates are evenly installed inside the funnel.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The upper part of the molecular sieve adsorption bed is equipped with a safety explosion relief port. When the pressure of the molecular sieve adsorption bed exceeds the limit, the pressure is relieved through the explosion-proof diaphragm to ensure the safety of the molecular sieve adsorption bed.

[0017] 2. The molecular sieve adsorption bed adopts internal insulation to reduce heat loss and save energy.

[0018] 3. The molecular sieve adsorption bed features a segmented grid frame design that is detachable and secured to the frame support with bolts. This allows for easy disassembly and maintenance. If a section of the grid frame is damaged, it can be replaced individually, reducing maintenance costs.

[0019] 4. The desorption air inlet is divided into upper and lower sections with adjustable space. This design effectively avoids deformation of the one-piece air inlet during welding.

[0020] 5. Each grid has right-angle locking blocks at its four corners, which are welded to the grid frame to ensure that each grid is stable and does not shift or tip over. When personnel enter the molecular sieve adsorption bed to install honeycomb molecular sieves or for maintenance, they can step on the grids to ensure their personal safety.

[0021] 6. The honeycomb molecular sieve adsorption bed is now internally insulated to reduce heat loss. A guide vane is added to the desorption air inlet of the honeycomb molecular sieve adsorption bed to ensure uniform air distribution and thorough high-temperature desorption and regeneration. Right-angle locking blocks are added to the grid support base to secure the four corners of the grid, ensuring stability and preventing displacement or tipping.

[0022] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a partial cross-sectional view of the grille of this utility model.

[0026] In the attached diagram, the components represented by each number are as follows:

[0027] 1-Molecular sieve adsorption bed shell, 111-Adsorption inlet, 112-Adsorption outlet, 2-Insulation layer, 3-Desorption inlet pipe, 4-Desorption outlet pipe, 51-Lower inspection port, 52-Upper inspection port, 6-Safety vent, 7-Skeleton support, 8-Grid frame, 81-Right-angle clamp, 9-Grid, 10-Honeycomb molecular sieve, 201-Carbon dioxide nozzle, 202-Upper thermocouple connector, 203-Lower thermocouple connector, 204-Upper differential pressure gauge connector, 205-Lower differential pressure gauge connector. Detailed Implementation

[0028] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-2 This utility model provides a technical solution for a vertical honeycomb molecular sieve adsorption bed: a vertical honeycomb molecular sieve adsorption bed includes a molecular sieve adsorption bed shell 1. The molecular sieve adsorption bed shell 1 is fully welded, and the welding is reliable, firm, beautiful and leak-free. The internal and external reinforcement of the molecular sieve adsorption bed shell 1 uses segment welding with a weld angle of 3-5mm. The surface weld seam is ground and free of defects such as welding slag.

[0030] The upper part of the molecular sieve adsorption bed shell 1 is provided with an adsorption inlet 111, a desorption outlet pipe 4, an upper thermocouple connector 202, an upper differential pressure gauge connector 204, and a carbon dioxide nozzle 201; the lower part of the molecular sieve adsorption bed shell 1 is provided with an adsorption outlet 112, a desorption inlet pipe 3, a lower thermocouple connector 203, and a lower differential pressure gauge connector 205; the inner cavity of the molecular sieve adsorption bed shell 1 is provided with a grid frame 8, the bottom of the grid frame 8 is uniformly provided with skeleton support members 7 that are connected and fixed to the molecular sieve adsorption bed shell 1, the grid frame 8 is uniformly provided with grids 9, and a honeycomb molecular sieve 10 is placed on the grids 9.

[0031] Furthermore, a heat insulation layer 2 is provided on the inner wall of the molecular sieve adsorption bed shell 1. The heat insulation layer 2 has a thickness of 120mm-180mm and is filled with aluminum silicate.

[0032] Furthermore, the middle part of the molecular sieve adsorption bed shell 1 is a vertical cuboid shape, with cone-shaped ends at the top and bottom.

[0033] Furthermore, a safety vent 6 is provided on the upper side wall of the molecular sieve adsorption bed shell 1, and an explosion-proof diaphragm is installed inside the safety vent 6; when the pressure of the molecular sieve adsorption bed is over-pressurized, the pressure is relieved through the explosion-proof diaphragm to ensure the safety of the molecular sieve adsorption bed.

[0034] Furthermore, the upper and lower parts of the molecular sieve adsorption bed shell 1 are respectively provided with an upper inspection port 52 and a lower inspection port 51.

[0035] Furthermore, right-angled clips 81 are installed at the corners of the grid frame 8 to position the grid 9, ensuring that the grid 9 does not shift or tip over.

[0036] Furthermore, the skeleton support 7 is fixed to the molecular sieve adsorption bed shell 1 by bolts, and a heat insulation pad is provided at the connection between the skeleton support 7 and the molecular sieve adsorption bed shell 1; the heat insulation pad is made of Teflon material, which effectively reduces heat conduction to the molecular sieve adsorption bed shell 1.

[0037] During the adsorption process, the organic waste gas to be treated enters the upper part of the honeycomb molecular sieve 10 through the adsorption inlet 111. When the organic waste gas flows through the honeycomb molecular sieve 10, the organic components in the waste gas are adsorbed on the surface of the honeycomb molecular sieve for a certain residence time, thereby purifying the waste gas, which is then discharged from the adsorption outlet 112.

[0038] One specific application of this embodiment is as follows: This utility model is a vertical honeycomb molecular sieve adsorption bed. The working principle of the honeycomb molecular sieve mainly involves physical processes such as adsorption, sieving and diffusion.

[0039] 1. Adsorption phenomenon: When gas comes into contact with honeycomb molecular sieve, some components will be adsorbed on the pore surface of the molecular sieve due to the interaction between molecules.

[0040] 2. Sieving principle: The pore size of the honeycomb molecular sieve is uniform. When molecules of different sizes pass through the pores, they will be sieved according to the pore size. Only molecules smaller than the pore size can pass through, while larger molecules are blocked.

[0041] 3. Diffusion phenomenon: During the sieving process, some molecules will diffuse inside the molecular sieve under the drive of concentration difference or pressure difference, which helps to further improve the separation effect.

[0042] An organic waste gas treatment system typically consists of 2-4 molecular sieve adsorption beds. After the molecular sieve adsorption beds have been operating for a certain period, the system switches to a different bed. The original adsorption process begins in the desorption process, where high-temperature air enters through the desorption inlet pipe 3, contacting the honeycomb molecular sieves. This desorbs VOCs, which then flow out with the regeneration air from the desorption outlet pipe 4, regenerating the honeycomb molecular sieves. The regenerated honeycomb molecular sieves are then cooled by introducing fresh air. The honeycomb molecular sieves periodically undergo adsorption, desorption, and cooling to purify the organic waste gas. The desorption temperature of the fixed molecular sieve bed is adjustable from 300℃ to 350℃ to ensure complete desorption of high-boiling-point substances.

[0043] The desorption inlet pipe 3 is divided into two sections. The lower desorption inlet, with a flared end and a reduced diameter, is located inside the molecular sieve adsorption bed. The upper desorption inlet is welded to the molecular sieve adsorption bed shell 1. The lower section has a larger diameter than the upper section, and the upper section is partially embedded inside the lower section before being welded in place. Several layers of guide vanes are installed inside the flared end section, allowing the high-temperature gas to be evenly distributed through the honeycomb molecular sieve layer.

[0044] In terms of safety control, the molecular sieve adsorption bed is equipped with one carbon dioxide nozzle 201 and two thermocouple connectors, namely upper thermocouple connector 202 and lower thermocouple connector 203. The temperature of the molecular sieve adsorption bed is monitored in real time. An alarm is triggered when the temperature exceeds the limit, activating the corresponding carbon dioxide pipeline valves to implement safety measures and ensure the safety of the molecular sieve adsorption bed device. Two differential pressure gauge connectors are installed on the molecular sieve adsorption bed, namely upper differential pressure gauge connector 204 and lower differential pressure gauge connector 205. Differential pressure transmitters monitor the differential pressure within the molecular sieve in the adsorption bed in real time. An alarm is triggered when the pressure exceeds the limit, prompting the replacement of the honeycomb molecular sieve.

[0045] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A vertical honeycomb molecular sieve adsorption bed, characterized in that: The device includes a molecular sieve adsorption bed shell (1), the upper part of which is provided with an adsorption inlet (111), a desorption outlet pipe (4), an upper thermocouple connector (202), an upper differential pressure gauge connector (204), and a carbon dioxide nozzle (201); the lower part of the molecular sieve adsorption bed shell (1) is provided with an adsorption outlet (112), a desorption inlet pipe (3), a lower thermocouple connector (203), and a lower differential pressure gauge connector (205); and the inner cavity of the molecular sieve adsorption bed shell (1) is provided with a grid frame (8). The bottom of the grid frame (8) is uniformly provided with a skeleton support (7) that is connected and fixed to the molecular sieve adsorption bed shell (1). The grid frame (8) is uniformly provided with a grid (9), and a honeycomb molecular sieve (10) is placed on the grid (9). The air inlet of the desorption air inlet pipe (3) is funnel-shaped, and a guide plate is uniformly installed inside the funnel. Right-angle clips (81) for positioning the grid (9) are installed at the corners of the grid frame (8). A heat insulation layer (2) is provided on the inner wall of the molecular sieve adsorption bed shell (1).

2. The vertical honeycomb molecular sieve adsorption bed according to claim 1, characterized in that: The insulation layer (2) has a thickness of 120mm-180mm.

3. The vertical honeycomb molecular sieve adsorption bed according to claim 1, characterized in that: The molecular sieve adsorption bed shell (1) has a vertical cuboid shape in the middle and cone-shaped at both ends.

4. The vertical honeycomb molecular sieve adsorption bed according to claim 1, characterized in that: A safety vent (6) is provided on the upper side wall of the molecular sieve adsorption bed shell (1), and an explosion-proof diaphragm is installed inside the safety vent (6).

5. A vertical honeycomb molecular sieve adsorption bed according to claim 1, characterized in that: The upper and lower parts of the molecular sieve adsorption bed shell (1) are respectively provided with an upper inspection port (52) and a lower inspection port (51).

6. A vertical honeycomb molecular sieve adsorption bed according to claim 1, characterized in that: The skeleton support (7) is fixed to the molecular sieve adsorption bed shell (1) by bolts, and a heat insulation pad is provided at the connection between the skeleton support (7) and the molecular sieve adsorption bed shell (1).

Images