Catalytic oxidation bed

Abstract

The utility model provides a catalytic oxidation bed. The catalytic oxidation bed comprises a shell, a catalytic component and a heater, organic waste gas enters the shell from the air inlet, is heated by the heater at the air inlet and then is subjected to catalytic oxidation reaction with the catalyst, so that the catalytic oxidation of the organic waste gas is realized. According to the technical scheme, the sampling door and the access door are arranged on the box body, a catalyst in the box body can be sampled, detected and replaced, the thermometer is arranged on the box body, the heater is arranged at the air inlet, the temperature in the box body can be monitored through the thermometer, and then the temperature in the box body is controlled by controlling the heater; and a heat preservation layer is arranged between the inner container of the box body and the outer shell of the box body, so that the temperature in the box body is kept.

Description

Technical Field

[0001] This utility model relates to the technical field of organic waste gas treatment, and in particular to a catalytic oxidation bed. Background Technology

[0002] With the continuous development of industrial society and productivity, people have begun to explore ways to protect the environment while promoting industrial production. Catalytic oxidation of organic waste gas generated in industrial production is a method to balance industrial production and environmental protection. Catalytic oxidation bed is a device that uses solid catalysts to convert pollutants in waste gas into compounds such as carbon dioxide and water through oxidation, thus purifying the pollutants in the waste gas.

[0003] During the catalytic oxidation of organic waste gas using a catalytic oxidation bed, the catalyst may become poisoned after a period of catalytic oxidation by absorbing impurities from the organic waste gas. This means that trace impurities can cause a significant decrease or loss of catalyst activity and selectivity. Timely cleaning and replacement are necessary to ensure the catalytic oxidation function of the catalytic oxidation bed. To ensure timely cleaning and replacement, catalyst monitoring is required. However, existing catalytic oxidation bed equipment lacks components for catalyst detection, making it impossible to determine in a timely manner whether the catalyst in the catalytic oxidation bed has reached the point where cleaning and replacement are necessary. Utility Model Content

[0004] Therefore, a catalytic oxidation bed is needed to solve the problem of catalyst monitoring.

[0005] To achieve the above objectives, the present invention provides the following technical solution: including a shell, a catalytic assembly, and a heater;

[0006] An air inlet is provided at the top of the housing, and an air outlet is provided at the bottom of the housing. The housing includes an inner liner, a heat insulation layer, and an outer shell. A sampling door and an inspection door are provided on the side wall of the housing. The heater is provided at the air inlet of the housing.

[0007] The catalytic component is disposed between the air inlet and the air outlet. The catalytic component includes a catalyst holder and a catalyst. The catalyst holder is fixed to the inner wall of the inner liner and is used to place the catalyst. An organosilicon pretreatment agent is laid on top of the catalyst.

[0008] The location of the sampling gate corresponds to the location where the organosilicon pretreatment agent is placed;

[0009] A thermometer is also installed on the shell to measure the temperature inside the shell in real time and provide feedback on the heating status inside the shell.

[0010] Furthermore, the insulation layer is made of aluminum silicate fiber blanket, which is fixed between the inner liner and the outer shell.

[0011] Furthermore, the catalytic oxidation bed also includes a heat storage air distribution layer, which is disposed between the air inlet and the catalytic component.

[0012] Furthermore, the catalytic component has two or more layers.

[0013] Furthermore, both the sampling door and the inspection door are equipped with quick-opening handwheel handles.

[0014] Furthermore, the width of the air inlet and the width of the air outlet are both adapted to the inner diameter of the inner liner.

[0015] Furthermore, the heater includes a burner and a flame shield. The burner's outlet is fixed inside the housing, and the flame shield is fitted onto the burner's outlet. The flame shield is staggered with the gas inlet direction.

[0016] Furthermore, the inspection door and the sampling door are located on adjacent sides of the surface where the heater is located.

[0017] Furthermore, the catalytic oxidation bed also includes a sealing blanket, which fills the space between the catalyst holder and the catalyst, and between the catalyst holder and the inner liner.

[0018] Furthermore, an explosion vent is provided on the casing.

[0019] The technical effects achieved by the above technical solution, which differ from existing technologies, are as follows:

[0020] This technical solution includes a sampling door located in the shell of the corresponding catalytic component. This door allows for sampling and testing of the organosilicon pretreatment agent, enabling periodic checks to detect adsorption of organosilicon components and timely monitoring of the catalytic component's condition. In case of catalyst poisoning, the catalytic component can be replaced and cleaned promptly. An insulation layer is placed between the outer shell and the inner liner, providing excellent insulation for the gas inside the liner without affecting the catalytic oxidation of the organic waste gas. A thermometer is installed on the shell to measure the internal temperature, allowing for adjustment of the heater's power to maintain a stable and suitable temperature for catalytic oxidation within the chamber. Attached Figure Description

[0021] Figure 1 This is a front sectional view as described in one embodiment;

[0022] Figure 2 A side sectional view as described in one embodiment;

[0023] Figure 3 A perspective view of one embodiment;

[0024] Figure 4 A perspective view of one embodiment;

[0025] Figure 5 This is a front sectional view as described in one embodiment.

[0026] Explanation of reference numerals in the attached figures:

[0027] Shell 1; Air inlet 11; Air outlet 12; Inner liner 13; Insulation layer 14; Outer shell 15; Inspection door 16; Sampling door 17; Explosion vent 18; Thermometer base 19;

[0028] Catalyst assembly 2; catalyst holder 211; catalyst 212; organosilicon pretreatment agent 23;

[0029] Heater 3; Burner head 31; Flame shield 32;

[0030] Wind distribution layer 4. Detailed Implementation

[0031] To explain in detail the technical content, structural features, objectives, and effects of the technical solution, the following description is provided in conjunction with specific embodiments and accompanying drawings.

[0032] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0033] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0034] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0035] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0036] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0037] Similar to the interpretation in the Patent Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also interpreted in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0038] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the components or parts referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0039] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0040] Please see Figures 1-5 In some embodiments, a catalytic oxidation bed includes a housing 1, a catalytic assembly 2, and a heater 3;

[0041] An air inlet 11 is provided on the top of the housing 1, and an air outlet 12 is provided on the bottom of the housing 1. The housing 1 includes an inner liner 13, a heat insulation layer 14, and an outer shell 15. A sampling door 17 and an inspection door 16 are provided on the side wall of the housing 1. The heater 3 is provided at the air inlet 11 of the housing 1.

[0042] The catalytic component 2 is disposed between the air inlet 11 and the air outlet 12. The catalytic component 2 includes a catalyst bracket 211 and a catalyst 212. The catalyst bracket 211 is fixed to the inner wall of the inner liner 13. The catalyst bracket 211 is used to place the catalyst 212. An organosilicon pretreatment agent 23 is laid on top of the catalyst 212.

[0043] The position of the sampling gate 17 corresponds to the position of the organosilicon pretreatment agent 23;

[0044] A thermometer is also installed on the housing to measure the temperature inside the housing in real time and provide feedback on the heating status inside the housing. Specifically, a thermometer base 19 is provided on the surface of the housing 1, the thermometer base 19 is connected to the inside and outside of the housing 1, and a thermometer can be installed on the thermometer base 19.

[0045] The shell 1 has a structure of stainless steel inner liner 13, insulation layer 14 and outer shell 15 composed of outer frame and buckle plate. The inner liner 13 is made of stainless steel. Organic waste gas enters the inner liner 13 from the air inlet 11. The stainless steel structure of the inner liner 13 can operate for a long time in harsh environments such as acid, alkali and high temperature. It is not easy to rust and deform. Moreover, the stainless steel structure can be cleaned and reused, thus ensuring that the inner liner 13 can be used stably for a long time. The inspection door 16 is located on the outer shell 15. When the inspection door 16 is opened, it connects the inside of the inner liner 13 with the outside of the shell 1. When the catalyst 211 is poisoned, the inspection door 16 is used to remove the catalyst from the shell 1 for cleaning and replacement. The catalyst 211 is placed on the catalyst holder 212, which is installed on the inner wall of the inner liner 13. When the catalyst 211 needs to be cleaned and replaced, the catalyst holder 212 and the catalyst 211 placed on it are taken out together. The sampling door 17 is also located on the outer shell 15. The position of the sampling door corresponds to the position of the organosilicon pretreatment agent 23. The organosilicon pretreatment agent 23 is laid on the catalyst assembly. Through the inspection door 16, it is possible to periodically check whether the organosilicon pretreatment agent 23 has adsorbed organosilicon components, thereby determining whether catalyst poisoning has occurred. The insulation layer 14 is disposed between the inner liner 13 and the outer shell 15. In the prior art, the method of inner insulation layer is often used, that is, the insulation layer is disposed on the inner wall of the inner liner 13. This method has the risk of the insulation layer material clogging the catalyst pores. The present technical solution, by disposing of the insulation layer 14 between the inner liner 13 and the outer shell 15, effectively avoids the risk of the insulation layer material clogging the catalyst pores.

[0046] A heater 3 is installed at the air inlet 11 of the casing 1 to heat the organic waste gas entering the casing 1, allowing the organic waste gas to undergo catalytic oxidation with the catalyst 211 inside the casing 1 at the optimal catalytic oxidation temperature. Simultaneously, a thermometer base 19 is provided on the surface of the casing 1, with a thermometer connected to the inner liner 13 and the outer casing 15. The thermometer's sensing end extends into the inner liner 13, while the graduated end extends out of the outer casing. This method allows for monitoring of the temperature inside the casing 1. The thermometer base 19 must maintain a certain distance from the heater 3 to ensure that the measured temperature is the gas temperature and to eliminate the influence of the heater 3 on the thermometer. Therefore, by observing the thermometer temperature, the heating power of the heater 3 can be controlled to maintain a stable temperature in the casing 1, ensuring that the catalytic oxidation of the organic waste gas within the casing 1 is always maintained at an optimal temperature.

[0047] In some embodiments, the insulation layer 14 is made of aluminum silicate fiber blanket, which is fixed between the inner liner 13 and the outer shell 15. Aluminum silicate fiber has advantages such as high temperature resistance, good thermal stability, low thermal conductivity, small heat capacity, good resistance to mechanical vibration, small thermal expansion, and good thermal insulation performance. Using aluminum silicate fiber blanket as the insulation layer 14 of the shell 1 can play a good role in thermal insulation.

[0048] In some embodiments, the catalytic oxidation bed further includes a heat storage air distribution layer 4, which is disposed between the air inlet 11 and the catalytic component. The heat storage air distribution layer 4 is positioned between the catalytic component closest to the air inlet 11 and the air inlet 11, ensuring that the organic waste gas first passes through the heat storage air distribution layer 4 before undergoing catalytic oxidation with the catalytic component 2. The shape of the heat storage air distribution layer 4 is adapted to the transverse cross-sectional shape of the shell 1, and the heat storage air distribution layer 4 can be directly fixed to the inner wall of the shell 1. The heat storage air distribution layer 4 is a plate-like structure with multiple uniformly opened through holes. The organic waste gas passes through the sieve holes of the heat storage air distribution layer 4 before entering the catalytic component 2, effectively uniformizing the airflow and improving the catalytic effect of the catalyst 211.

[0049] In some embodiments, the catalytic assembly 21 has two or more layers. Using two or more layers of catalytic assemblies can improve the waste gas purification efficiency. When the required purification efficiency of organic waste gas exceeds 98%, two layers of catalytic assemblies are necessary to meet the requirement. An organosilicon pretreatment agent is laid on top of the uppermost catalytic assembly, while the remaining catalytic assemblies are not covered with an organosilicon pretreatment agent. The uppermost catalytic assembly preferentially contacts the organic waste gas. Laying an organosilicon pretreatment agent on the uppermost catalytic assembly allows for a more accurate assessment of catalyst poisoning within the casing and avoids excessive waste of the organosilicon pretreatment agent.

[0050] In some embodiments, both the sampling door 17 and the inspection door 16 employ quick-opening handwheel handles. Quick-opening handles are easy to install and have a lower cost.

[0051] In some embodiments, the width of the air inlet 11 and the width of the air outlet 12 are both adapted to the inner diameter of the inner liner 13. This facilitates the flow of organic waste gas within the housing 1.

[0052] In some embodiments, the heater 3 includes a burner 31 and a flame shield 32. The burner 31 has its outlet fixed inside the housing, and the flame shield 32 is fitted over the outlet of the burner 31. The flame shield 32 is staggered with the gas inlet direction. One end of the flame shield 32 is fitted over the outlet of the burner 31, and the other end extends into the inner liner 13. The burner 31 burns inside the flame shield 32, and the heat is transferred to the inner liner 13 through the flame shield 32. Because the flame shield 32 is staggered with the gas inlet direction, the organic waste gas receives heat from the flame shield 32 when it enters the inner liner 13 through the air inlet 11, thereby achieving the effect of heating the organic waste gas.

[0053] In some embodiments, the inspection door 16 and the sampling door 17 are located on adjacent sides of the surface where the heater 3 is located. This arrangement ensures that the inspection door 16 and the sampling door 17 have sufficient space for sampling and maintenance, and this arrangement can maintain a certain distance from the flame outlet to avoid accidental burns during sampling and maintenance.

[0054] In some embodiments, a sealing blanket is also included, which fills the space between the catalyst holder and the catalyst, and between the catalyst holder and the inner liner. After the organic waste gas is input from the air inlet 11 of the catalytic oxidation bed, as it passes through the catalyst assembly 2, the sealing blanket, positioned between the catalyst 212 and the catalyst holder 211, not only seals the gap between the catalyst 212 and the catalyst holder 211, but also tightly presses the catalysts 212 placed on the catalyst holder 211 together, thereby effectively promoting contact between the organic waste gas and the catalyst 212 and preventing short circuits in the gas path.

[0055] In some embodiments, an explosion vent 18 is provided on the surface of the housing 1. The purpose of providing the explosion vent 18 is to release pressure through the explosion vent 18 when an explosion occurs inside the equipment or when the pressure inside the equipment exceeds the design pressure, thereby ensuring the safety of the catalytic oxidation bed.

[0056] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this utility model patent.

Claims

1. A catalytic oxidation bed, characterized in that: Includes the housing, catalytic converter, and heater; An air inlet is provided on the top of the housing, and an air outlet is provided on the bottom of the housing. The housing includes an inner liner, a heat insulation layer, and an outer shell. A sampling door and an inspection door are provided on the side wall of the housing. The heater is provided at the air inlet of the housing. The catalytic component is disposed between the air inlet and the air outlet. The catalytic component includes a catalyst holder and a catalyst. The catalyst holder is fixed to the inner wall of the inner liner and is used to place the catalyst. An organosilicon pretreatment agent is laid on top of the catalyst. The location of the sampling gate corresponds to the location where the organosilicon pretreatment agent is placed; The shell is also equipped with a thermometer to measure the temperature inside the shell in real time and provide feedback on the heating status inside the shell.

2. The catalytic oxidation bed according to claim 1, characterized in that: The insulation layer is made of aluminum silicate fiber blanket, which is fixed between the inner liner and the outer shell.

3. The catalytic oxidation bed according to claim 1, characterized in that: The catalytic oxidation bed further includes a heat storage air distribution layer, which is disposed between the air inlet and the catalytic component.

4. A catalytic oxidation bed according to claim 1 or 3, characterized in that: The catalytic component has two or more layers.

5. A catalytic oxidation bed according to claim 1, characterized in that: Both the sampling door and the maintenance door use handwheel quick-opening door handles.

6. A catalytic oxidation bed according to claim 1, characterized in that: The width of the air inlet and the width of the air outlet are both adapted to the inner diameter of the inner liner.

7. A catalytic oxidation bed according to claim 1, characterized in that: The heater includes a burner and a flame shield. The burner's outlet is fixed inside the housing, and the flame shield is fitted onto the burner's outlet. The flame shield and the gas inlet direction are staggered.

8. A catalytic oxidation bed according to claim 7, characterized in that: The inspection door and the sampling door are located on the adjacent side of the surface where the heater is located.

9. A catalytic oxidation bed according to claim 1, characterized in that: The catalytic oxidation bed also includes a sealing blanket, which is filled between the catalyst holder and the catalyst, and between the catalyst holder and the inner liner.

10. A catalytic oxidation bed according to claim 1, characterized in that: An explosion vent is provided on the casing.

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