CN216244335U

CN216244335U - Compact catalytic combustion bed

Info

Publication number: CN216244335U
Application number: CN202122983423.8U
Authority: CN
Inventors: 王鹏鹏
Original assignee: China Shipbuilding Power Engineering Institute Co Ltd
Current assignee: China Shipbuilding Power Engineering Institute Co Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-04-08
Anticipated expiration: 2031-11-30

Abstract

The utility model belongs to the technical field related to waste gas treatment, and discloses a compact catalytic combustion bed which comprises a shell, and a heater, a catalyst placing supporting plate and a heat exchanger which are sequentially arranged in the shell from top to bottom, wherein an inlet of the shell is positioned at the upstream of the heater, an outlet of the shell is communicated with the heat exchanger, the catalyst placing supporting plate is used for placing a catalyst, a vent hole is formed in the catalyst placing supporting plate, outside air enters the shell through the inlet and flows to the catalyst after being heated by the heater so as to heat the catalyst, and the inlet is also used for circulating waste gas to be treated. According to the catalytic combustion bed, the heater, the catalyst placing supporting plate and the heat exchanger are integrated in the shell through the structure, so that the catalytic combustion bed is more compact in overall structure, smaller in size, smaller in occupied area and higher in energy utilization rate.

Description

Compact catalytic combustion bed

Technical Field

The utility model relates to the technical field of waste gas treatment, in particular to a compact catalytic combustion bed.

Background

Volatile Organic Compounds (VOCs) refer to organic compounds having a saturated vapor pressure of greater than 70Pa at room temperature and a boiling point of 260 ℃ or lower at normal pressure, or all organic compounds having a corresponding volatility and a vapor pressure of greater than or equal to 10Pa at 20 ℃ in china. In the industrial coating field, the problem of treatment and emission of VOCs waste gas can be involved. The existing catalytic combustion technology is usually used for treating VOCs waste gas, and because VOCs components are complex and combustion temperature is high, a catalytic combustion bed which is one of core components of the catalytic combustion technology has a complex structure and a large volume, and has the problems of short service life, high manufacturing cost and low energy utilization.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a compact catalytic combustion bed which is more compact in overall structure, smaller in volume, smaller in occupied area and higher in energy utilization rate

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a compact catalytic combustion bed, includes the casing, from top to bottom set gradually in layer board and heat exchanger are placed to heater, catalyst in the casing, the import of casing is located the upper reaches of heater, the export intercommunication of casing the heat exchanger, the catalyst is placed the layer board and is used for placing the catalyst, just the catalyst is placed the layer board and has been seted up the air vent, and the outside air warp the import gets into the casing and by flow direction behind the heater heating the catalyst, with right the catalyst heats, the import still is used for the circulation pending waste gas.

Preferably, the air conditioner further comprises a baffle plate, and the baffle plate is arranged in the inlet.

Preferably, the number of the baffles is plural, and the baffles are arranged in the inlet at intervals.

Preferably, the inner wall of the shell is coated with an inner heat-insulating layer.

Preferably, the inner heat-insulating layer is made of heat-insulating cotton.

Preferably, the outer wall of the shell is wrapped with an outer insulating layer.

Preferably, the outer heat-insulating layer is made of heat-insulating cotton.

Preferably, the shell is provided with a heat exchanger inlet interface and a heat exchanger outlet interface, and the refrigerant enters the heat exchanger through the heat exchanger inlet interface and flows out of the heat exchanger outlet interface.

The utility model has the beneficial effects that: when VOCs waste gas treatment is carried out, firstly, outside air enters through the inlet and is heated by the heater, then the heated outside air flows to the catalyst to heat the catalyst to enable the catalyst to be at the optimal catalytic temperature, then VOCs waste gas enters through the inlet and is heated by the heater, then the heated VOCs waste gas flows through the catalyst, catalytic combustion reaction is carried out under the action of the catalyst to generate carbon dioxide and water, and heat is released. The high-temperature gas after combustion enters a heat exchanger to participate in heat recovery, waste heat utilization is carried out through the heat exchanger, and the gas after heat exchange is discharged through an outlet. Through above-mentioned structure, integrate heater, catalyst and heat exchanger in the casing, it makes catalytic combustion bed overall structure compacter, and the volume is littleer, and then area is littleer, and energy utilization is higher.

Drawings

Fig. 1 is a schematic structural view of a compact catalytic combustion bed provided by the present invention.

In the figure:

1. a housing; 11. an inlet; 12. an outlet; 13. an inner insulating layer; 14. an outer insulating layer; 2. a heater; 3. a catalyst placing supporting plate; 4. a heat exchanger; 5. a baffle.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The present invention provides a compact catalytic combustion bed that can be used for the treatment of exhaust from catalytic combustion, and this embodiment is preferred for the treatment of VOCs exhaust. As shown in fig. 1, the compact catalytic combustion bed comprises a shell 1, a heater 2, a catalyst placing support plate 3 and a heat exchanger 4 which are sequentially arranged in the shell 1 from top to bottom, wherein the heater 2 is used for heating outside air and waste gas, the catalyst placing support plate 3 is used for placing a catalyst 10, and the heat exchanger 4 is used for recovering heat of gas generated after catalytic combustion so as to improve the utilization rate of waste heat.

The housing 1 has a substantially cylindrical structure, and an inlet 11 is formed at the top of the housing, wherein the inlet 11 may be a cylindrical structure having a certain height, and external air and exhaust gas (e.g., VOCs exhaust gas) can enter the interior of the housing 1 through the inlet 11. An outlet 12 communicated with the heat exchanger 4 is arranged at the bottom of the shell 1, the structure of the outlet 12 is similar to that of the inlet 11, and the outlet 12 can also be a cylindrical structure, and the heat of the gas generated after catalytic combustion is exchanged and recovered by the heat exchanger 4 and then flows out through the outlet 12.

The inner wall cladding at casing 1 has interior heat preservation 13, and this interior heat preservation 13 can adopt the heat preservation cotton to make, also can adopt other insulating materials that have the heat preservation to make, through the structure of this interior heat preservation 13, can prevent that the heat is too much to distribute away through casing 1 for waste gas is in the best catalytic combustion environment, also can make the heat more of production participate in the heat transfer in-process of heat exchanger 4 simultaneously, in order to improve energy utilization efficiency. Optionally, in order to further improve the heat preservation and insulation effect, an outer heat preservation layer 14 may be further coated on the outer wall of the casing 1, and the outer heat preservation layer 14 may be made of heat preservation cotton or other materials with heat preservation and insulation properties.

In this embodiment, preferably, a flow guide plate 5 is disposed inside the inlet 11, and is capable of guiding the external air and the exhaust gas, so that the flow resistance of the external air and the exhaust gas is smaller, and the external air and the exhaust gas are uniformly distributed, thereby improving the catalytic combustion effect. Above-mentioned guide plate 5 can set up a plurality ofly, and the interval sets up between a plurality of guide plates 5 to realize evenly distributed and the water conservancy diversion of outside air and waste gas.

Above-mentioned heater 2 sets up in casing 1, and preferably sets up in interior heat preservation 13 inboard, outside air footpath import 11 gets into behind the casing 1, heater 2 can flow through, and heat by heater 2's heater block, and the air flow after the heating is behind catalyst 10, can heat catalyst 10, so that catalyst 10's temperature reaches reaction temperature (if the optimum temperature of catalyst 10 who participates in the catalytic combustion of VOCs waste gas is 310 ℃), and then make the catalytic combustion effect of waste gas better, the exhaust-gas treatment effect is also better. It should be noted that the heating component of the heater 2 may be a heating component (such as a heating wire) commonly used in the prior art.

The catalyst placing support plate 3 is used for placing the catalyst 10, and the catalyst placing support plate 3 is provided with vent holes, so that after external air and waste gas are heated by the heater 2, the external air and the waste gas can enter the heat exchanger 4 through the vent holes.

The heat exchanger 4 may be divided into two heat exchange channels, one of which is used to circulate the high-temperature gas generated by catalytic combustion of the exhaust gas, and the other of which is used to circulate a refrigerant (the refrigerant may be different according to the purpose of waste heat utilization, such as water, and forms the required hot water after heat exchange, or other liquid or gas to be heated). Optionally, in this embodiment, a heat exchanger inlet port and a heat exchanger outlet port may be respectively disposed on the left and right sides of the heat exchanger 4, and the refrigerant enters the heat exchanger 4 through the heat exchanger inlet port, exchanges heat with the high-temperature gas after catalytic combustion, and then flows out through the heat exchanger outlet port.

In use, the compact catalytic combustion bed of the present embodiment first flows in the outside air through the inlet 11, then the heater 2 heats the outside air to a set temperature, and then the heated air flows to the catalyst 10 to heat the catalyst 10 to an optimal reaction temperature. And then introducing waste gas into an inlet 11 of the shell 1, after the waste gas is guided and uniformly divided by the guide plate 5, the waste gas flows into the heater 2 and is heated by the heater 2, and then the heated waste gas flows through the catalyst 10, and a catalytic combustion reaction is carried out under the action of the catalyst 10, and heat is released. The formed high-temperature gas flows into the heat exchanger 4 and exchanges heat with a refrigerant in the other channel of the heat exchanger 4 to realize waste heat utilization, and after the heat exchange, the cooled gas flows out through an outlet 12 of the shell 1.

The compact catalytic combustion bed of this embodiment is through above-mentioned structure, places layer board 3 and heat exchanger 4 integration in casing 1 with heater 2, catalyst, and it makes catalytic combustion bed overall structure compacter, and the volume is littleer, and then area is littleer, and energy utilization is higher.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the utility model. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a compact catalytic combustion bed, its characterized in that, including casing (1), from top to bottom set gradually in heater (2), catalyst in casing (1) place layer board (3) and heat exchanger (4), import (11) of casing (1) are located the upper reaches of heater (2), export (12) intercommunication of casing (1) heat exchanger (4), the catalyst is placed layer board (3) and is used for placing catalyst (10), just the air vent has been seted up in layer board (3) is placed to the catalyst, and the outside air warp import (11) get into casing (1) and by flow direction behind heater (2) heating catalyst (10), it is right catalyst (10) heat, import (11) still are used for circulating the waste gas of treating.

2. The compact catalytic combustion bed according to claim 1, further comprising a baffle (5), the baffle (5) being disposed within the inlet (11).

3. The compact catalytic combustion bed according to claim 2, characterized in that the deflector (5) is provided in plurality, a plurality of deflectors (5) being arranged at intervals in the inlet (11).

4. The compact catalytic combustion bed according to any of claims 1-3, characterized in that the inner wall of the housing (1) is coated with an inner insulating layer (13).

5. The compact catalytic combustion bed according to claim 4, characterized in that the inner insulation layer (13) is made of insulation cotton.

6. The compact catalytic combustion bed according to any of claims 1-3, characterized in that the outer wall of the housing (1) is coated with an outer insulating layer (14).

7. The compact catalytic combustion bed according to claim 6, characterized in that the outer insulation layer (14) is made of insulation cotton.

8. The compact catalytic combustion bed according to any of claims 1 to 3, wherein the housing (1) is provided with a heat exchanger inlet connection and a heat exchanger outlet connection, and the coolant enters the heat exchanger (4) through the heat exchanger inlet connection and flows out through the heat exchanger outlet connection.