CN214075802U - Radial flow waste gas adsorbs processing apparatus - Google Patents
Radial flow waste gas adsorbs processing apparatus Download PDFInfo
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- CN214075802U CN214075802U CN202022714959.5U CN202022714959U CN214075802U CN 214075802 U CN214075802 U CN 214075802U CN 202022714959 U CN202022714959 U CN 202022714959U CN 214075802 U CN214075802 U CN 214075802U
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Abstract
The utility model relates to a radial flow waste gas adsorbs processing apparatus, including casing, upper cover, low head, waste gas import and at least one gas outlet. The device is provided with at least two layers of adsorption baskets and a central pipe, wherein the adsorption baskets are of annular structures and are formed by enclosing an inner frame body and an outer frame body, the lower parts of the adsorption baskets are provided with adsorption basket supporting plates, and adsorbents are filled in the adsorption baskets. The inner ring of the inner frame body is an inner gap, and an outer gap is arranged between the outer frame body and the shell. The outer edge of the adsorption basket supporting plate of the two adjacent layers of adsorption baskets is extended and connected with the shell or the inner edge of the adsorption basket supporting plate is extended and connected with the central pipe, so that each layer of adsorption baskets form an independent adsorption system. The utility model discloses having optimized exhaust adsorption treatment device's structure, having shortened the circulation of gas distance, having reduced the resistance of adsorption bed, difficult thermal safety and the adsorption efficiency that gathers that produces have improved exhaust-gas treatment.
Description
Technical Field
The utility model belongs to the technical field of industrial waste gas handles, a radial flow waste gas adsorbs processing apparatus is related to.
Background
The organic waste gas mainly comes from industries which use coal, petroleum, natural gas and the like as fuels or raw materials or related chemical enterprises. Volatile Organic Compounds (VOCs) are common and ubiquitous atmospheric pollutants in the atmosphere. Common components include aromatic hydrocarbons, esters, ketones, ethers, etc. Mainly comes from the exhaust gas discharged by industrial production processes, such as petrochemical industry, pharmacy, pesticides, printing, artificial leather, shoemaking, paint, coating and the like. VOCs have strong volatility, diffusivity and chemical toxicity, and damage to the internal organs and the nervous system can be caused by long-term contact of human bodies. In addition, as precursors for forming ozone and PM2.5, VOCs undergo a photochemical reaction under the action of light to cause photochemical pollution, so that the control of the emission of industrial VOCs becomes the key point of the national atmospheric pollutant pollution prevention and treatment work.
The prior VOCs control technology mainly comprises an adsorption method, a liquid absorption method, a combustion method and a photocatalytic oxidation method. The adsorption treatment method of VOCs is to utilize an adsorbent to adsorb organic waste gas formed by evaporation of volatile organic compounds. The adsorption method has the advantages of low energy consumption, mature process, high removal rate, thorough purification and easy popularization, and has good environmental and economic benefits. In recent years, as the environmental protection requirements become stricter and stricter, the adsorption technology is rapidly developed, and new adsorption processes and equipment are developed. Meanwhile, the improvement of the adsorbent, such as the use of activated carbon fiber and zeolite, also expands the application range of the adsorption technology, and makes the adsorption of VOCs become the preferred method of the organic waste gas treatment technology.
The existing adsorption method for treating industrial waste gas generally means that the waste gas flows through a bed layer axially, the gas circulation distance is long, the resistance is large, heat accumulation is easy to generate, explosion can be caused by hot spots, and the safety of waste gas treatment is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a radial flow exhaust adsorbs processing apparatus optimizes exhaust and adsorbs processing apparatus's structure, reduces the resistance that adsorbs the bed, reduces and avoids appearing producing the thermal unsafe factor that gathers and arouse, improves the security and the reliability of production.
The technical scheme of the utility model is that: the radial flow waste gas adsorption treatment device is of a cylindrical structure or a box-type structure, and the cylindrical structure comprises a shell, an upper end enclosure, a lower end enclosure, a waste gas inlet and at least one gas outlet. The adsorption treatment device is provided with at least two layers of adsorption baskets and a central pipe, the adsorption baskets are of annular structures and are formed by enclosing an inner frame body and an outer frame body which are coaxial, an adsorption basket supporting plate is arranged at the lower part of each layer of adsorption basket, the adsorption baskets are supported by the adsorption basket supporting plate, and adsorbent is filled in the adsorption baskets. The inner ring of the inner frame body is an inner gap, and an outer gap is arranged between the outer frame body and the shell. The central tube is positioned in the inner gap, and the lower part of the central tube is arranged on the lower seal head and is communicated with the air inlet. The outer edge of the adsorption basket supporting plate of the two adjacent layers of adsorption baskets is extended and connected with the shell or the inner edge of the adsorption basket supporting plate is extended and connected with the central pipe, so that each layer of adsorption baskets form an independent adsorption system.
The inner frame body and the outer frame body are made of sieve plates or metal wire nets, and the metal is stainless steel, alloy, aluminum or copper. The adsorption treatment device is provided with a bypass inlet, and the bypass inlet is arranged at the top of the shell. The adsorbent is active carbon, NaY molecular sieve, ZSM-5 molecular sieve, SBA-15 molecular sieve, MCM-41 molecular sieve or active clay, and the adsorbents in each layer of adsorption baskets of the adsorption treatment device are the same or different. The adsorption basket supporting plate is fixed on the shell or the central tube in a welding or screw connection mode. The number of adsorption baskets and the selection of adsorbent are determined according to the composition of the organic waste gas and the purification requirement.
The utility model discloses radial flow waste gas adsorbs processing apparatus mainly used adsorbs the great organic waste gas's of heat of adsorption absorption treatment. The utility model discloses optimized exhaust gas adsorption treatment device's structure, waste gas radially flows through the bed, and the circulation distance is short, has reduced the resistance that adsorbs the bed, and the difficult thermal gathering that produces, the temperature regulation effect of cooperation bypass can be with the temperature system near the finite range in predetermined optimum in adsorbing the bed, avoids appearing the explosion accident that the focus arouses, has improved industrial waste gas treatment's security. Through the layering adsorption, can select multiple adsorbent to adsorb, improve the efficiency of industrial waste gas adsorption operation, improve the variety and the result of use that the adsorbent selected. The utility model discloses simple structure, it is low to make and the installation requirement, and the loading and unloading is easy, saves power.
Drawings
FIG. 1 is a schematic structural view of a radial flow exhaust adsorption treatment device;
FIG. 2 is a view A-A of FIG. 1;
FIG. 3 is a schematic structural view of a three-layer adsorption basket exhaust gas adsorption treatment device;
FIG. 4 is a schematic structural view of a four-layer adsorption basket exhaust gas adsorption treatment device;
FIG. 5 is a schematic view showing the flow of gas in the adsorption state in two adsorption baskets;
FIG. 6 is a schematic view showing the flow of gas in the adsorption state in the three-layer adsorption basket;
FIG. 7 is a schematic view showing the flow of gas in the adsorption state in four adsorption baskets;
FIG. 8 is a schematic view showing the flow direction of gas in a two-layer adsorption basket desorption state;
FIG. 9 is a schematic view showing the flow direction of gas in a desorption state in three-layer adsorption baskets;
FIG. 10 is a schematic view showing the flow direction of gas in a desorption state of four-layer adsorption baskets;
wherein: 1-shell, 2-upper end enclosure, 3-lower end enclosure, 4-waste gas inlet, 5-gas outlet, 6-bypass inlet, 7-adsorption basket supporting plate, 8-inner frame body, 9-outer frame body, 10-adsorption bed, 10-1-first layer adsorption basket, 10-2-second layer adsorption basket, 10-3-third layer adsorption basket, 10-4-fourth layer adsorption basket, 11-central tube, 12-inner gap, 12-2-second layer or second, inner gap between three-adsorption layer adsorption basket and central tube, 12-4-fourth layer adsorption basket and central tube inner gap, 13-outer gap, 13-1-first and second layer adsorption basket outer gap, 13-3-third or third and fourth layer adsorption basket outer gap, 14-partition plate
Detailed Description
The present invention will be described in detail with reference to the following examples and drawings. The protection scope of the present invention is not limited to the embodiments, and those skilled in the art can make any changes within the scope defined by the claims.
Example 1
The utility model discloses radial flow exhaust gas adsorbs processing apparatus is the cylindrical structure, as shown in fig. 1, including casing 1, upper cover 2, low head 3, waste gas import 4, bypass import 6 and gas outlet 5, waste gas import and gas outlet are located the low head, and the bypass import is located the upper cover. The adsorption treatment device is internally provided with a first layer of adsorption basket 10-1, a second layer of adsorption basket 10-2 and a central pipe 11. As shown in fig. 2, the adsorption basket is of an annular structure and is enclosed by an inner frame body 8 and an outer frame body 9 which are coaxial, and the inner frame body and the outer frame body are made of sieve plates. The inner ring of the inner frame 8 is an inner gap 12, and an outer gap 13 is arranged between the outer frame 9 and the shell. The central tube is positioned in the inner gap, and the lower part of the central tube is arranged on the lower seal head and is communicated with the air inlet. The lower part of each layer of adsorption basket is provided with an adsorption basket supporting plate 7, the adsorption basket is supported by the adsorption basket supporting plate, and the adsorbents filled in the first layer of adsorption basket and the second layer of adsorption basket are activated carbon. The top of the first layer of adsorption basket 10-1 is provided with a partition plate 14, so that the bypass inlet 6 is communicated with the outer gap 13. The inner edge of the adsorption basket supporting plate of the first layer of adsorption basket 10-1 is connected with the central pipe in a welding mode, the outer edge of the adsorption basket supporting plate of the second layer of adsorption basket 10-2 is connected with the shell in a welding mode, an inner gap 12-2 between the second layer of adsorption basket and the central pipe is formed, and the two layers of adsorption baskets are respectively independent adsorption systems.
This embodiment is VOCs (ethyl acetate) adsorption treatment in the waste gas of pharmaceutical enterprise, and the processing procedure includes adsorption process and desorption process.
(1) An adsorption process: as shown in FIG. 5, the solution at 40 ℃ contains 450mg/m3The organic waste gas of the ethyl acetate enters the inner gap 12 from the waste gas inlet 4 through the central pipe 11, flows through the sieve pore of the inner frame body 8 and the activated carbon bed layer of the first layer of adsorption basket 10-1 for adsorption, and passes through the outer frame body 9 to the outer gap 13 after adsorption is finished. Enters the second layer of adsorption basket 10-2 through the outer gap, is adsorbed by the second layer of adsorption basket from outside to inside in radial direction, and then is discharged from the gas outlet 5 through the inner gap 12-2 between the second layer of adsorption basket and the central pipe. The space velocity of the waste gas flowing through the adsorption bed is 10000h-1The temperature of the bed layer is controlled to be 95-100 ℃, and if overtemperature occurs, organic waste gas can be introduced into the bypass inlet 6 for cooling. The content of ethyl acetate in the tail gas discharged from the outlet 5 is 15mg/m3The removal efficiency was 96.7%.
(2) The desorption treatment process comprises the following steps: as shown in fig. 8, the adsorbent having completed the adsorption process is desorbed with the gas flow direction opposite to the adsorption process. Namely: hot air with the temperature of 200 ℃ is introduced from the gas outlet 5, enters the second layer adsorption basket 10-2 through the inner gap 12-2 between the second layer adsorption basket and the central pipe, is desorbed through the second layer adsorption basket from inside to outside in the radial direction, and then enters the first layer adsorption basket 10-1 through the outer gap 13, and is desorbed through the first layer adsorption basket from outside to inside in the radial direction. The desorbed gas enters the inner gap 12 and is discharged through the central tube 11 and the waste gas inlet 4. The bypass inlet is closed during desorption.
Example 2
The utility model discloses another embodiment is as shown in fig. 3, including casing 1, upper cover 2, low head 3, waste gas import 4, bypass import 6 and gas outlet 5, waste gas import and gas outlet are located the low head, and the bypass import is located the upper cover. The adsorption treatment device is internally provided with a first layer of adsorption basket 10-1, a second layer of adsorption basket 10-2, a third layer of adsorption basket 10-3 and a central pipe 11. The inner ring of the inner frame body 8 is an inner gap 12, the central pipe is positioned in the inner gap, and the lower part of the central pipe is arranged on the lower end enclosure and is communicated with the air inlet. The lower part of each layer of adsorption basket is provided with an adsorption basket supporting plate 7, the adsorption basket is supported by the adsorption basket supporting plate, the adsorbents in the first layer of adsorption basket and the third layer of adsorption basket are activated carbon, and the adsorbent in the second layer of adsorption basket is a NaY molecular sieve. The inner edge of the adsorption basket supporting plate of the first layer of adsorption basket 10-1 is extended and welded with the central pipe, the outer edge of the adsorption basket supporting plate of the second layer of adsorption basket 10-2 is extended and welded with the shell, and an outer gap 13-1 of the first layer of adsorption basket and the second layer of adsorption basket is formed. The inner edge of the adsorption basket supporting plate of the third layer of adsorption basket 10-3 is extended and welded with the central pipe to form an inner gap 12-2 between the second and third adsorption layer adsorption baskets and the central pipe and an outer gap 13-3 of the third adsorption basket, so that the three layers of adsorption baskets are respectively independent adsorption systems. The top of the first layer of adsorption basket 10-1 is provided with a partition plate 14, so that the bypass inlet 6 is communicated with the outer gap 3-1 of the first and second layers of adsorption baskets.
This embodiment is the processing of VOCs in the methanol production, and the processing procedure includes adsorption process and desorption process.
(1) An adsorption process: as shown in FIG. 6, the solution at 35 ℃ contains 530mg/m3VOCs in methanol production enters an inner gap 12 from a waste gas inlet 4 through a central pipe 11, and then flows through the sieve pore of an inner frame body 8 to flow through an activated carbon bed layer of a first layer of adsorption basket 10-1 for adsorption, and then passes through an outer frame body 9 to reach an outer gap 13-1 of the first layer of adsorption basket and a second layer of adsorption basket after adsorption is finished. Enters a second layer of adsorption basket 10-2 through an outer gap, is adsorbed by a NaY molecular sieve bed layer from outside to inside in the radial direction, then enters a third layer of adsorption basket 10-3 through an inner gap 12-2 between the second and third adsorption layer adsorption baskets and a central tube, and is adsorbed by an activated carbon bed layer from inside to outside in the radial direction. Finally, the gas is discharged from the gas outlet 5 through the outer gap 13-3 of the third adsorption basket. The space velocity of the methanol VOCs waste gas flowing through the adsorption bed is 12000h-1The temperature of the bed layer is controlled to be 85-90 ℃, and if overtemperature occurs, organic waste gas can be introduced into the bypass inlet 6 for cooling. The methanol content in the tail gas discharged from the outlet 5 is 20mg/m3The removal efficiency was 98.2%.
(2) The desorption treatment process comprises the following steps: as shown in fig. 9, the adsorbent is desorbed after the adsorption process, the desorption process gas flows in the opposite direction to the adsorption process, that is: hot air with the temperature of 200 ℃ is introduced from the gas outlet 5, enters the third layer adsorption basket 10-3 through the outer gap 13-3 of the third adsorption basket for desorption, then enters the second layer adsorption basket 10-2 through the inner gap 12-2 between the second and third adsorption layer adsorption baskets and the central pipe for desorption, and finally enters the first layer adsorption basket 10-1 through the outer gap 13-1 of the first and second adsorption baskets for desorption. And after desorption, the gas enters the inner gap 12, and the desorbed gas is discharged through the central pipe 11 and the waste gas inlet 4. The bypass inlet is closed during desorption.
Example 3
The utility model discloses another embodiment is as shown in fig. 4, including casing 1, upper cover 2, low head 3, waste gas import 4, bypass import 6 and gas outlet 5, waste gas import and gas outlet are located the low head, and the bypass import is located the upper cover. Adsorb processing apparatus inside and be equipped with center tube 11 and 4 layers of adsorption basket, 4 layers of adsorption basket are promptly: a first layer of adsorption basket 10-1, a second layer of adsorption basket 10-2, a third layer of adsorption basket 10-3 and a fourth layer of adsorption basket 10-4. The inner ring of the inner frame body 8 is an inner gap 12, the central pipe is positioned in the inner gap, and the lower part of the central pipe is arranged on the lower end enclosure and is communicated with the air inlet. The lower part of each layer of adsorption basket is provided with an adsorption basket supporting plate 7, the adsorption basket is supported by the adsorption basket supporting plate, the first layer of adsorption basket is SBA-15 molecular sieve, the adsorbent filled in the second layer of adsorption basket is activated clay, the adsorbent filled in the third layer of adsorption basket is MCM-41 molecular sieve, and the adsorbent filled in the fourth layer of adsorption basket is activated carbon. The inner edges of the adsorption basket supporting plates of the first layer of adsorption basket 10-1 and the third layer of adsorption basket 10-3 are extended and welded with a central pipe, the outer edges of the adsorption basket supporting plates of the second layer of adsorption basket 10-2 and the fourth layer of adsorption basket 10-4 are extended and welded with a shell to form an inner gap 12-2 between the second layer of adsorption basket and the central pipe, an inner gap 12-4 between the fourth layer of adsorption basket and the central pipe, an outer gap 13-1 between the first layer of adsorption basket and the second layer of adsorption basket and an outer gap 13-3 between the third layer of adsorption basket and the fourth layer of adsorption basket, so that the three layers of adsorption baskets are respectively independent adsorption systems. The top of the first layer of adsorption basket 10-1 is provided with a partition plate 14, so that the bypass inlet 6 is communicated with the outer gap 3-1 of the first and second layers of adsorption baskets.
This embodiment is VOCs processing system in benzene production, and the process includes adsorption process and desorption process.
(1) An adsorption process: as shown in FIG. 7, the solution at 50 ℃ contains 420mg/m3VOCs in benzene production enters from the waste gas inlet 4 through the central pipe 11The absorption is completed through the outer gap 13-1 of the first and second absorption baskets, enters the second layer absorption basket 10-2 through the gap 12-2 between the second and third absorption baskets and the central tube, enters the third layer absorption basket 10-3 through the inner gap 12-2 between the second and third absorption baskets and the central tube, and is absorbed through the second layer absorption basket MCM-41 molecular sieve bed layer from inside to outside and the radial direction, enters the fourth layer absorption basket 10-4 through the outer gap 13-3 between the third and fourth absorption baskets and is absorbed through the activated carbon bed layer from outside to inside and the radial direction, and finally is discharged from the gas outlet 5 through the inner gap 12-4 between the fourth layer absorption basket and the central tube. The space velocity of the benzene VOCs waste gas flowing through the adsorption bed is 9000h-1The temperature of the bed layer is controlled to be 80-85 ℃, and if overtemperature occurs, organic waste gas can be introduced into the bypass inlet 6 for cooling. The benzene content in the tail gas discharged from the outlet 5 is 10mg/m3The removal efficiency was 98.3%.
(2) The desorption treatment process comprises the following steps: as shown in fig. 10, the adsorbent having completed the adsorption process is desorbed with the gas flow direction opposite to the adsorption process. Namely: hot air with the temperature of 200 ℃ is introduced from a gas outlet 5, enters the third layer of adsorption basket 10-3 through an inner gap 12-4 between the fourth layer of adsorption basket and the central pipe for desorption, then sequentially enters the third layer of adsorption basket 10-3 through an outer gap 13-3 of the third adsorption basket for desorption, enters the second layer of adsorption basket 10-2 through an inner gap 12-2 between the second and third adsorption layer of adsorption basket and the central pipe for desorption, and finally enters the first layer of adsorption basket 10-1 through an outer gap 13-1 of the first and second layers of adsorption basket for desorption. And after desorption, the gas enters the inner gap 12, and the desorbed gas is discharged through the central pipe 11 and the waste gas inlet 4. The bypass inlet is closed during desorption.
Claims (6)
1. The utility model provides a radial flow waste gas adsorbs processing apparatus, includes casing (1), upper cover (2), low head (3), waste gas import (4) and at least one gas outlet (5), characterized by: the adsorption treatment device is provided with at least two layers of adsorption baskets (10) and a central pipe (11), the adsorption baskets are of an annular structure and are formed by enclosing an inner frame body (8) and an outer frame body (9) which are coaxial, an adsorption basket supporting plate (7) is arranged at the lower part of each layer of adsorption basket, the adsorption baskets (10) are supported by the adsorption basket supporting plates, and adsorbents are filled in the adsorption baskets (10); the inner ring of the inner frame body (8) is an inner gap (12), and an outer gap (13) is arranged between the outer frame body (9) and the shell; the central pipe is positioned in the inner gap, and the lower part of the central pipe is arranged on the lower end enclosure and is communicated with the air inlet; the outer edge of the adsorption basket supporting plate of the two adjacent layers of adsorption baskets is extended and connected with the shell or the inner edge of the adsorption basket supporting plate is extended and connected with the central pipe, so that each layer of adsorption baskets form an independent adsorption system.
2. The radial flow exhaust adsorption treatment device of claim 1, wherein: the inner frame body (8) and the outer frame body (9) are made of sieve plates or metal wire nets.
3. The radial flow exhaust adsorption treatment device of claim 1, wherein: the adsorption treatment device is provided with a bypass inlet (6), and the bypass inlet is formed in the top of the shell (1).
4. The radial flow exhaust adsorption treatment device of claim 1, wherein: the adsorbent is activated carbon, NaY molecular sieve, ZSM-5 molecular sieve, SBA-15 molecular sieve, MCM-41 molecular sieve or activated clay, and the adsorbents in each layer of adsorption basket of the adsorption treatment device are the same or different.
5. The radial flow exhaust gas adsorption treatment device of claim 4, wherein: the number of the adsorption baskets (10) and the selection of the adsorbent are determined according to the composition of the organic waste gas and the purification requirement.
6. The radial flow exhaust adsorption treatment device of claim 1, wherein: the adsorption basket supporting plate (7) is fixed on the shell or the central pipe in a welding or screw connection mode.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112295358A (en) * | 2020-11-20 | 2021-02-02 | 河北宏顺旺吉环保科技有限公司 | Radial flow waste gas adsorption treatment device and treatment method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112295358A (en) * | 2020-11-20 | 2021-02-02 | 河北宏顺旺吉环保科技有限公司 | Radial flow waste gas adsorption treatment device and treatment method |
| CN112295358B (en) * | 2020-11-20 | 2024-08-20 | 河北宏顺旺吉环保科技有限公司 | Radial flow waste gas adsorption treatment device and treatment method |
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