CN214120085U

CN214120085U - Self-heating catalytic oxidation device with heat supplementing structure

Info

Publication number: CN214120085U
Application number: CN202023052341.3U
Authority: CN
Inventors: 马培勇; 张颖; 谢尚臻
Original assignee: Anhui Fuel Smart Technology Co ltd
Current assignee: Anhui Fuel Smart Technology Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-09-03
Anticipated expiration: 2030-12-17

Abstract

The utility model discloses an autothermic catalytic oxidation ware with concurrent heating structure, including reactor body, air inlet and gas vent, its characterized in that: the reactor body comprises at least two spiral coils, the tip of the spiral coil on the reactor body is provided with the side cap, at least two spiral coils nest each other and set up and keep apart out at least two-layer adjacent screw channel, be provided with the catalyst on at least one spiral coil, at least one deck screw channel becomes inlet channel with the air inlet intercommunication, at least one deck screw channel becomes exhaust passage with the gas vent intercommunication, this internal concurrent heating structure that still is provided with of reactor, concurrent heating structure includes heat accumulation cover and combustor, the combustor sets up in the heat accumulation cover inner chamber. Compared with the prior art, the utility model has the following advantages: compact structure can carry out standardized production, according to the demand direct selection installation quantity can, with low costs, the air-resistor is little, has reduced draught fan load, and long-term operation cost is extremely low.

Description

Self-heating catalytic oxidation device with heat supplementing structure

Technical Field

The invention relates to the field of catalytic combustion devices, in particular to an autothermal catalytic oxidizer with a heat supplementing structure.

Background

The catalytic combustion is a purification method for oxidizing and decomposing combustible substances in the exhaust gas at a lower temperature by using a catalyst, and compared with a thermal combustion method, the catalytic combustion requires less auxiliary fuel, is low in energy consumption and is small in equipment and facility volume. However, the conventional catalytic combustion apparatus is not widely used for various reasons.

The existing catalytic combustion device utilizes a honeycomb structure to load a catalyst, although the contact area is large, the air resistance is large, and a large amount of kinetic energy needs to be consumed for driving airflow to flow; in addition, because the content of combustible components in the feed gas is unstable, the temperature fluctuation of the catalytic center is large, and even if the heat exchanger is adopted to recover the waste heat of the tail gas, the temperature of the catalytic center is often lower than the reaction temperature of catalytic oxidation, so that the reaction can not be carried out. In the existing scheme, in order to solve the problems, the gas resistance is often reduced by increasing the cross section of the honeycomb structure of the catalytic reaction center, and the temperature of the catalytic center is kept by increasing the heat exchange area, using a heat accumulator for heat storage, using a heating device for heating a catalytic area or adding a combustible component with a certain concentration in the raw material. The method is a 'sheep death reinforcement' type remedy, the device is often larger in size, more complex in structure and higher in energy consumption, and the problem cannot be fundamentally solved by a 'palliative' means for 'relieving' the problem at the cost of higher cost.

The applicant adopts the scheme of the spiral coil plate to combine heat exchange with catalytic oxidation, so that the problems can be solved. But low concentration organic waste gas is because the heat that produces is not enough to maintain the regional temperature of catalysis, need increase the concurrent heating structure in the catalytic zone, although general electrical heating heaies up fast, thermal capacity is low, the temperature can descend rapidly under the operating mode of big amount of wind, can't maintain the regional temperature of catalysis, we adopt the mode that combustor and heat accumulation cover combined together, avoid big amount of wind to the influence of combustor combustion stability on the one hand, utilize the heat radiation of combustor production and the heat of hot flue gas simultaneously, can reach efficient exhaust-gas treatment effect under the condition of low-cost operation.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an autothermal catalytic oxidizer with a heat supplementing structure.

The invention is realized by the following technical scheme: the utility model provides an autothermic catalytic oxidation ware with concurrent heating structure, includes reactor body, air inlet and gas vent, its characterized in that: the reactor body comprises at least two spiral coils, the tip of the spiral coil on the reactor body is provided with the side cap, at least two spiral coils nest each other and set up and keep apart out at least two-layer adjacent screw channel, be provided with the catalyst on at least one spiral coil, at least one deck screw channel becomes inlet channel with the air inlet intercommunication, at least one deck screw channel becomes exhaust passage with the gas vent intercommunication, this internal concurrent heating structure that still is provided with of reactor, concurrent heating structure includes heat accumulation cover and combustor, the combustor sets up in the heat accumulation cover inner chamber.

As a further improvement to the above scheme, the combustor is a gas combustor or an oil combustor.

As a further improvement to the above scheme, the heat storage cover is arranged at the center of the spiral rolling plate.

As a further improvement to the above, the heat storage cover is made of a heat storage material, preferably a heat storage ceramic.

As a further improvement of the scheme, the heat storage cover is provided with air holes.

As a further improvement to the above, the intake passage is adjacent to the exhaust passage.

As a further improvement of the scheme, the catalyst is arranged on the spiral rolling plate and positioned at the center of the spiral, the area of the spiral rolling plate where the catalyst is arranged is a catalytic reaction area, and the area without the catalyst is a heat exchange area.

Compared with the prior art, the invention has the following advantages: the invention is suitable for the field of gas catalytic combustion, and particularly has great technical advantages in the field of catalytic combustion with unstable raw material gas component content, such as VOC disposal and the like. The whole device is compact in structure, can be subjected to standardized production, can directly select the installation number according to the requirement, and can greatly reduce the cost; meanwhile, the device has small air resistance, reduces the load of a draught fan, and has extremely low long-term operation cost compared with an activated carbon adsorption treatment technology.

Drawings

FIG. 1 is a schematic cross-sectional view of an autothermal catalytic oxidizer having a heat-compensating structure.

FIG. 2 is a schematic diagram of a longitudinal cross-sectional structure of an autothermal catalytic oxidizer having a heat-compensating structure.

Detailed Description

The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.

Example 1

An autothermic catalytic oxidizer with a heat compensating structure, comprising a reactor body, an air inlet 1 and an exhaust port 2, characterized in that: the reactor body comprises at least two spiral coils 7, the tip of spiral coil 7 is provided with side cap 5 on the reactor body, at least two spiral coils 7 are nested each other and set up and keep apart out at least two-layer adjacent screw channel, be provided with the catalyst on at least one spiral coil 7, at least one deck screw channel becomes inlet channel 3 with 1 intercommunication of air inlet, at least one deck screw channel becomes exhaust passage 4 with 2 intercommunications of gas vent, still be provided with heat supply structure 6 in the reactor body, heat supply structure 6 includes heat accumulation cover 61 and combustor 62, combustor 62 sets up in heat accumulation cover 61 inner chamber.

The spiral coil plate 7 is compact in structure, the spiral channel surrounds layer by layer, the spiral coil plate 7 and the heat exchanger which is excellent in structure and provides a catalytic reaction place are small in overall wind resistance, heat dissipation to the external environment is reduced to the maximum extent, enough contact area can be provided for catalytic reaction on the premise that the volume of the reactor is kept, the catalytic reaction is directly carried out on the side wall of the spiral channel, and the wind resistance is small.

The heat exchange structure formed by the mutually nested spiral channels can increase the temperature of the feed gas by utilizing tail gas most efficiently, the flow directions of air flows in the air inlet channel 3 and the air outlet channel 4 are opposite in mass transfer and belong to countercurrent contact, the air inlet channel 3 continuously recovers heat and returns the heat to the catalytic reaction area positioned in the center of the spiral rolling plate 7, but the air flows belong to 'concurrent' contact in heat transfer, and the waste gas after catalytic oxidation is firstly contacted with the feed gas with the highest temperature for heat exchange, so that the temperature reduction range is minimum, thereby ensuring that the high-temperature area is positioned in the spiral central area and the temperature is lower towards the outer layer. The structure ensures that the heat released by the catalytic oxidation reaction can be fully utilized in the catalytic reaction area, so that the temperature of the catalytic center can be stably kept at a higher level, the continuous operation of the catalytic reaction is effectively ensured, and the heat of the catalytic oxidation is utilized to maintain the continuous operation of the catalytic oxidation reaction.

In the case of low VOC content, supplementary heat is required to effectively maintain the catalytic oxidation reaction, so that the heat supplementing structure 6 is provided. Because the gas in the device rotates spirally, the heat accumulation cover 61 can protect the flame stability of the burner 62, and meanwhile, the heat is stored by the heat accumulation cover 61 as far as possible and then released outwards, so that the condition that the temperature of a catalytic area is too low due to the rapid dissipation of the heat is avoided. The solution with the burner 62 also enables to use the heat of the hot flue gases generated by the combustion.

The combustor 62 is a gas combustor or an oil combustor; the heat storage cap 61 is provided at the spiral center of the spiral rolled sheet 7. Fuel and gas burner convenient to use, use cost is low, and the central point that can guarantee the device in addition department setting in spiral center puts the temperature highest, avoids taking place the condition of hot migration, effectively keeps the whole heat recovery efficiency of device, and the heat that catalytic oxidation produced is utilized to the maximum efficiency.

The heat storage cover 61 is made of a heat storage material, preferably a heat storage ceramic; the heat storage cover 61 is provided with air holes. The heat storage ceramic material has good heat storage effect and high temperature resistance, and the arrangement of the air holes can facilitate the emission of hot smoke and the entrance of air.

The air inlet channel 3 and the exhaust channel 4 are arranged adjacently, the catalyst is arranged on the spiral rolling plate 7 and is positioned at the center of the spiral, the area of the spiral rolling plate 7 where the catalyst is arranged is a catalytic reaction area, and the area where the catalyst is not arranged is a heat exchange area. The catalyst is arranged at the spiral central section of the spiral coil 7, so that the spiral central section of the spiral coil 7 is a catalytic reaction zone, and the rest external spiral section is a heat exchange zone. One, more or all of the spiral central sections of the spiral coils 7 can be selected as the catalytic reaction zone as required. The area of the spiral coil plate 7 drawn by a dotted line in the drawing is the catalytic reaction area.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an autothermic catalytic oxidation ware with concurrent heating structure, includes reactor body, air inlet and gas vent, its characterized in that: the reactor body comprises at least two spiral coil plates, a side cover is arranged at the end part of each spiral coil plate on the reactor body, at least two spiral coil plates are nested with each other to form at least two layers of adjacent spiral channels, at least one spiral coil plate is provided with a catalyst, at least one layer of spiral channel is communicated with an air inlet to form an air inlet channel, at least one layer of spiral channel is communicated with an air outlet to form an air outlet channel, a heat supplementing structure is further arranged in the reactor body and comprises a heat storage cover and a combustor, and the combustor is arranged in an inner cavity of the heat storage cover.

2. The autothermal catalytic oxidizer of claim 1 having a heat-compensating structure, wherein: the combustor is a gas combustor or an oil combustor.

3. The autothermal catalytic oxidizer of claim 1 having a heat-compensating structure, wherein: the heat storage cover is arranged at the spiral center of the spiral rolling plate.

4. The autothermal catalytic oxidizer of claim 1 having a heat-compensating structure, wherein: the heat storage cover is made of heat storage ceramic.

5. The autothermal catalytic oxidizer of claim 1 having a heat-compensating structure, wherein: and the heat storage cover is provided with air holes.

6. The autothermal catalytic oxidizer of claim 1 having a heat-compensating structure, wherein: the intake passage is adjacent to the exhaust passage.

7. The autothermal catalytic oxidizer of claim 1 having a heat-compensating structure, wherein: the catalyst is arranged on the spiral coil plate and positioned at the center of the spiral, the area of the spiral coil plate where the catalyst is arranged is a catalytic reaction area, and the area without the catalyst is a heat exchange area.