Rotary concentrated VOC (Volatile Organic Compound) coupling denitration purification device

Abstract

The utility model discloses a rotary concentrated VOC (volatile organic compound) coupling denitration purification device which comprises a rotary concentration unit, a filter screen arranged at an inlet of the rotary concentration unit, a flow guide flue arranged in the rotary concentration unit, a rotary concentration device arranged on the right side of the flow guide flue, and an adsorption flue arranged at the upper half part of the flow guide flue, one half of the lower part of the diversion flue is a desorption flue, the other half of the lower part of the diversion flue is a cooling flue, the rotary concentration device comprises an adsorption area, a desorption area and a cooling area which are in one-to-one correspondence with the adsorption flue, the desorption flue and the cooling flue, the desorption flue is connected with the desorption area through a heating pipeline, and the cooling area is connected with the cooling flue through a cooling pipeline. Through the adsorption and desorption functions of the rotary concentration device, large-air-volume and low-concentration VOC (Volatile Organic Compounds) can be effectively treated, and the purification efficiency is improved; the filter screen prevents dust from blocking adsorption points, protects the rotary concentration device, and prolongs the service life of equipment. VOC and NOx are efficiently converted at the same time through low-temperature catalysis of the catalytic combustion unit, and pollutant emission is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas purification technical field especially relates to a rotary type concentration VOC coupling denitration purification device. BACKGROUND

[0002] Volatile organic compounds (VOC) are a kind of organic compounds that can be easily volatilized at room temperature, and the pollution status of VOC has become the focus of attention in the field of environment and public health. In the industrial production process, the flue gas discharged often has a large air volume, but the content of VOC is relatively low. Traditional treatment methods, such as direct combustion method or catalytic combustion method, will face high energy consumption problems when treating these low-concentration VOC. Although the low-temperature plasma technology or the photocatalytic technology may be lower in energy consumption, its treatment efficiency is not satisfactory. In addition, other types of pollutants, including fine particulate matter, nitrogen oxides (NO x ) and dioxins, are generated in the industrial production process, and these pollutants can have serious impact on the environment and human health. SUMMARY

[0003] The utility model discloses a rotary type concentration VOC coupling denitration purification device to solve the technical problems existing in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model provides a technical scheme: a rotary type concentration VOC coupling denitration purification device, comprising a rotary concentration unit and a catalytic combustion unit, the left side of the rotary concentration unit is an exhaust gas inlet, a filter screen is arranged at the inlet of the rotary concentration unit, the filter screen serves as a flue gas pretreatment equipment and is used for preliminarily filtering the exhaust gas entering the equipment to remove dust therein, preventing dust from entering the rotary concentration device and causing blockage of the adsorption point to reduce the flue gas purification effect, a flow guide flue is arranged in the rotary concentration unit, a rotary concentration device for adsorbing and desorbing VOC is arranged at the right side of the flow guide flue, the upper half of the flow guide flue is an adsorption flue, the lower half of the flow guide flue is a desorption flue, and the other lower half is a cooling flue, the rotary concentration device comprises an adsorption zone, a desorption zone and a cooling zone corresponding to the adsorption flue, the desorption flue and the cooling flue respectively to realize the continuity and efficiency of the exhaust gas treatment process; the flow guide flue is used for exhaust gas diversion to ensure that the exhaust gas uniformly passes through each region of the rotary concentration device, the desorption flue is connected with the desorption zone through a heating pipeline, an electric heater is arranged in the heating pipeline, and the electric heater is used for heating the exhaust gas to provide a suitable temperature for the VOC on the desorption rotary concentration device, and the rotary concentration device is connected with the catalytic combustion unit through a flue gas conveying assembly.

[0005] Preferably, the flue gas conveying assembly comprises a waste gas fan for conveying the desorbed waste gas to the catalytic combustion unit and a concentrated waste gas fan for conveying the adsorbed waste gas to the catalytic combustion unit, the input of the waste gas fan is connected with a waste gas pipe, the output of the waste gas fan is connected with the catalytic combustion unit, and the waste gas pipe is in communication with the desorption zone of the rotary concentration device.

[0006] The waste gas fan and the concentrated waste gas fan adopt variable frequency fans, and the concentration of VOC in the waste gas can be controlled by controlling the air volume; the input of the concentrated waste gas fan is connected with a concentrated waste gas pipe, the output of the concentrated waste gas fan is connected with the catalytic combustion unit, and the concentrated waste gas pipe is in communication with the adsorption zone of the rotary concentration device.

[0007] Preferably, the catalytic combustion unit adopts a multi-layer adiabatic reactor, and the catalytic combustion unit specifically comprises an ammonia / air mixing chamber, an upper catalyst box and a lower catalyst box, the ammonia / air mixing chamber is located at the bottom of the catalytic combustion unit, and the injected reducing agent is mixed with air uniformly before being contacted with the catalyst.

[0008] The upper catalyst box is a denitration catalyst layer box, and a second catalyst bed is arranged in the upper catalyst box, and a suitable honeycomb catalyst is used as the catalyst to provide a larger surface area and higher catalytic efficiency, and the waste gas pipe is connected with the upper catalyst box.

[0009] The lower catalyst box is a VOC catalyst layer box, and a first catalyst bed is arranged in the lower catalyst box, and the first catalyst bed and the second catalyst bed are placed in series, and the concentrated waste gas pipe is connected with the lower catalyst box.

[0010] Preferably, the waste gas pipe and the concentrated waste gas pipe are provided with ammonia injection equipment for simultaneously treating NOx and dioxin in the waste gas at the inlet of the upper catalyst box and the lower catalyst box of the catalytic combustion unit. x Preferably, the waste gas pipe and the concentrated waste gas pipe are provided with ammonia injection equipment for simultaneously treating NOx and dioxin in the waste gas at the inlet of the upper catalyst box and the lower catalyst box of the catalytic combustion unit.

[0011] Preferably, manholes and catalyst installation doors are arranged on the upper catalyst box and the lower catalyst box, so as to facilitate workers to observe the situation in the equipment and replace the catalyst.

[0012] Preferably, a temperature sensor and a real-time monitoring device are arranged at the outlet of the waste gas pipe, the concentrated waste gas pipe and the catalytic combustion unit, so as to ensure the stability and safety of the device, and realize accurate monitoring and control of the entire purification process.

[0013] Preferably, the inner wall of the rotary concentration unit is provided with a heat preservation layer, and the outer layer of the heating pipeline is also provided with a heat preservation layer, the rotary concentration unit is used for containing and protecting the internal components, and the integrity and sealing of the equipment are ensured. The heat preservation layer of the inner wall of the rotary concentration unit is used for reducing heat loss, maintaining the temperature stability of the inside of the equipment, and improving energy efficiency; the heat preservation layer of the outer layer of the heating pipeline prevents the temperature of the adsorption area from being affected by heat conduction, and ensures that the adsorption concentration effect is not disturbed by heat loss.

[0014] The utility model discloses beneficial effects:

[0015] The utility model discloses through the adsorption and desorption function of rotary concentration device, effectively handle the VOC of large wind volume, low concentration, improve the purification efficiency, filter screen prevents dust from plugging adsorption point, protects rotary concentration device, prolongs the service life of equipment. The low-temperature catalysis of catalytic combustion unit realizes the efficient conversion of VOC and NO simultaneously, reduces pollutant emission, and does not need secondary heating, saves energy consumption. The setting of waste gas fan, concentrated waste gas fan adopts frequency conversion fan and real -time monitoring equipment, realizes the accurate control of VOC concentration in waste gas and the real -time monitoring of whole purification process, optimizes purification efficiency and energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings described herein are used to provide further understanding of the utility model and constitute a part of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute undue limitations on the utility model.

[0017] Figure 1 It is overall structure schematic diagram of the utility model;

[0018] Figure 2 It is rotary concentration unit schematic diagram of the utility model;

[0019] Figure 3 It is rotary concentration device schematic diagram of the utility model;

[0020] Figure 4 It is catalytic combustion unit schematic diagram of the utility model.

[0021] Drawing mark:

[0022] 1-rotary concentration unit;2-heat preservation layer;3-waste gas inlet;4-filter screen;5-flow guide flue;6-electric heater;7-rotary concentration device;8-waste gas fan;9-waste gas pipe;10-concentrated waste gas fan;11-concentrated waste gas pipe;12-ammonia injection equipment;13-ammonia / air mixing chamber;14-first catalytic bed;15-second catalytic bed;16-manhole and catalyst installation door;17-real -time monitoring equipment. SPECIFIC EMBODIMENTS

[0023] The specific embodiments of the present application will be described in detail in this part, and the preferred embodiments of the present application are shown in the drawings, the purpose of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0024] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right and the like, is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the present application.

[0025] In the description of the present application, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than and the like are not included in the number, above, below, within and the like are included in the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0026] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing and connecting should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application according to the specific content of the technical scheme.

[0027] Reference Figures 1-4The utility model discloses a preferred embodiment, a rotary type concentrated VOC coupling denitration purification device, including rotary concentration unit and catalytic combustion unit, rotary concentration unit left side is waste gas inlet 3, and the filter screen 4 is arranged at the entrance of rotary concentration unit, and the filter screen 4 is used as flue gas pretreatment equipment, is used for the preliminary filtration of the waste gas of entering equipment, removes the dust in it, prevents big dust from entering rotary concentration device 7, and the adsorption point position is blocked, leads to the flue gas purification effect reduction, and rotary concentration unit is provided with the flue gas duct 5 in, and the flue gas duct 5 right side is provided with the rotary concentration device 7 for adsorbing and desorbing VOC, and the upper half of flue gas duct 5 is adsorption flue, and the lower half area of flue gas duct 5 is desorption flue, and the lower half area is cooling flue, and the rotary concentration device 7 includes the adsorption area, desorption area and cooling area corresponding with adsorption flue, desorption flue and cooling flue one to one, to realize the continuity and high efficiency of waste gas treatment process, and the flue gas duct 5 is used for waste gas shunting, ensures that waste gas passes through the area of rotary concentration device 7 evenly, and the desorption flue is connected with the desorption area through the heating pipeline, and the electric heater 6 is arranged in the heating pipeline, and the electric heater 6 is used for heating waste gas, and provides suitable temperature for the VOC on the desorption rotary concentration device 7, and the rotary concentration device 7 is connected with catalytic combustion unit through flue gas conveying assembly. Preferably, the rotary concentration device 7 rotates at constant speed, and the gaseous pollutants in the gas passing through the adsorption area are adsorbed, and then rotate to the desorption area along with the rotary concentration device 7. The heated waste gas desorbs the concentrated gaseous pollutants, and the clean rotary concentration device 7 rotates to the cooling area for cooling, and returns to the adsorption area after cooling to continue adsorbing the gaseous pollutants in the waste gas, to realize the continuous treatment of waste gas.

[0028] Further, the inner wall of the rotary concentration unit 1 is provided with a heat preservation layer 2, and the outer layer of the heating pipeline is also provided with a heat preservation layer 2. The rotary concentration unit 1 is used for accommodating and protecting the internal components, and ensures the integrity and sealing of the device. The heat preservation layer of the inner wall of the rotary concentration unit 1 is used for reducing heat loss, maintaining the temperature stability of the device interior, and improving energy efficiency; the heat preservation layer 2 of the outer layer of the heating pipeline prevents heat energy from affecting the temperature of the adsorption area through conduction, and ensures that the adsorption concentration effect is not disturbed by heat loss.

[0029] In this embodiment, the flue gas conveying assembly includes a waste gas fan 8 for conveying the desorbed waste gas to the catalytic combustion unit and a concentrated waste gas fan 10 for conveying the adsorbed waste gas to the catalytic combustion unit. The input of the waste gas fan 8 is connected with a waste gas pipe 9, and the output of the waste gas fan 8 is connected with the catalytic combustion unit. The waste gas pipe 9 communicates with the desorption area of the rotary concentration device 7.

[0030] The waste gas fan 8 and the concentrated waste gas fan 10 are variable frequency fans, which can control the concentration of VOC in the waste gas by controlling the air volume; the input end of the concentrated waste gas fan 10 is connected with the concentrated waste gas pipe 11, the output end of the concentrated waste gas fan 10 is connected with the catalytic combustion unit, and the concentrated waste gas pipe 11 is communicated with the adsorption area of the rotary concentration device 7.

[0031] Specifically, the waste gas fan 8 provides power to transport the desorbed waste gas to the catalytic combustion unit through the waste gas pipe 9; the concentrated waste gas fan 11 transports the adsorbed concentrated high-concentration VOC waste gas to the catalytic combustion unit through the concentrated waste gas pipe 11.

[0032] In this embodiment, the catalytic combustion unit adopts a multi-layer adiabatic reactor, and specifically includes an ammonia / air mixing chamber 13, an upper catalyst box and a lower catalyst box. The ammonia / air mixing chamber 13 is located at the bottom of the catalytic combustion unit, the reducing agent and air sprayed here are mixed uniformly and then contacted with the catalyst. Specifically, the reducing agent sprayed into the pipeline at the inlet of the catalytic combustion unit is ammonia water, and the waste gas removes NOx and dioxin after low-temperature catalysis;

[0033] The upper catalyst box is a denitration catalyst layer box, and a second catalyst bed 15 is arranged in the upper catalyst box. The catalyst adopts a suitable honeycomb catalyst to provide a larger surface area and higher catalytic efficiency. The waste gas pipe 9 is connected with the upper catalyst box.

[0034] The lower catalyst box is a VOC catalyst layer box, and a first catalyst bed 14 is arranged in the lower catalyst box. The first catalyst bed 14 and the second catalyst bed 15 are placed in series. The concentrated waste gas pipe 11 is connected with the lower catalyst box.

[0035] Further, the waste gas pipe 9 and the concentrated waste gas pipe 11 are provided with ammonia spraying equipment 12 for simultaneously treating NOx and dioxin in the waste gas at the inlet of the upper catalyst box and the lower catalyst box of the catalytic combustion unit. x Further, the waste gas pipe 9 and the concentrated waste gas pipe 11 are provided with ammonia spraying equipment 12 for simultaneously treating NOx and dioxin in the waste gas at the inlet of the upper catalyst box and the lower catalyst box of the catalytic combustion unit.

[0036] Further, the upper catalyst box and the lower catalyst box are both provided with a manhole and a catalyst installation door 16, which facilitates workers to observe the situation in the equipment and replace the catalyst.

[0037] In this embodiment, the waste gas pipe 9, the concentrated waste gas pipe 11 and the outlet of the catalytic combustion unit are all provided with a temperature sensor and a real-time monitoring device 17. According to the concentration of volatile organic compounds and the temperature change, the operating frequency of the concentrated waste gas fan 11 can be adjusted to realize accurate monitoring and control of the entire purification process, and ensure the stability and safety of the device operation.

[0038] The working principle of the utility model is: the purification process of waste gas is firstly pretreated by filter screen 4 to remove dust to prevent the adsorption point from being blocked. Subsequently, the waste gas is evenly distributed to the adsorption area of rotary concentration device 7 by diversion flue 5, and VOC is adsorbed here. Then, the electric heater heats the waste gas to a suitable temperature to promote the desorption of VOC, and the heat insulation layer 2 prevents the heat energy conduction from affecting the adsorption effect. The adsorption, desorption and cooling area of rotary concentration device 7 continuously and efficiently treat the waste gas. The high-concentration VOC waste gas and the waste gas after desorption are then respectively transported to the catalytic combustion unit by waste gas fan 8 and concentrated waste gas fan 10, ammonia is sprayed into the inlet of the catalytic combustion unit to remove NOx and dioxin, and the high-efficiency surface area of the catalyst promotes the conversion of pollutants. During the whole process, the temperature sensor and real-time monitoring device 17 ensure accurate monitoring and control of the purification process, and the waste gas fan 8 and the concentrated waste gas fan 10 adjust the air volume according to the needs, optimizing the purification efficiency and energy consumption.

[0039] Compared with the prior art, the filter screen 4 is used as a pretreatment device to effectively prevent dust from blocking the adsorption point, protect the rotary concentration device 7 and prolong the service life of the device. The cooling flue in the diversion flue 5 and the cooling area of the rotary concentration device 7 are designed to prevent the rotary concentration device 7 from being cooled in time, and the adsorption efficiency of the waste gas pollutants is reduced due to the high temperature. Since the catalyst of the catalytic combustion unit has a suitable temperature similar to that of the SCR, the efficient conversion of VOC and NOx is realized under low-temperature catalysis, especially the dioxin, which reduces the emission of pollutants. The SCR does not need secondary heating, saving energy consumption; and the real-time monitoring device 17 is used for real-time monitoring of the whole purification process.

[0040] The utility model allows adjusting the air volume and temperature according to actual needs to adapt to different waste gas treatment requirements.

[0041] Without conflict, the above additional technical features can be freely combined and used by those skilled in the art.

[0042] The above is only the preferred embodiment of the utility model, and any technical solution that achieves the same purpose by basically the same means is within the protection scope of the utility model.

Claims

1. A rotary concentrated VOC coupled denitration purification device, characterized in that: The rotary concentration unit and the catalytic combustion unit are included, the waste gas inlet is arranged on the left side of the rotary concentration unit, a filter screen is arranged at the inlet of the rotary concentration unit, a flow guide flue is arranged in the rotary concentration unit, a rotary concentration device is arranged on the right side of the flow guide flue, the upper half of the flow guide flue is an adsorption flue, the lower half of the flow guide flue is a desorption flue, and the other half of the lower half of the flow guide flue is a cooling flue, the rotary concentration device includes an adsorption zone, a desorption zone and a cooling zone corresponding to the adsorption flue, the desorption flue and the cooling flue, the desorption flue is connected with the desorption zone through a heating pipeline, an electric heater is arranged in the heating pipeline, and the rotary concentration device is connected with the catalytic combustion unit through a flue gas conveying assembly.

2. A rotary concentrated VOC coupled denitration purifier device according to claim 1, characterized in that: The flue gas conveying assembly includes a waste gas fan for conveying the desorbed waste gas to the catalytic combustion unit and a concentrated waste gas fan for conveying the adsorbed waste gas to the catalytic combustion unit, a waste gas pipe is connected with the input of the waste gas fan, the output of the waste gas fan is connected with the catalytic combustion unit, and the waste gas pipe is communicated with the desorption zone of the rotary concentration device. The waste gas fan and the concentrated waste gas fan are variable frequency fans, a concentrated waste gas pipe is connected with the input of the concentrated waste gas fan, the output of the concentrated waste gas fan is connected with the catalytic combustion unit, and the concentrated waste gas pipe is communicated with the adsorption zone of the rotary concentration device.

3. A rotary concentrated VOC coupled denitration purifier device according to claim 2, characterized in that: The catalytic combustion unit adopts a multi-layer adiabatic reactor, and specifically includes an ammonia / air mixing chamber, an upper catalyst box and a lower catalyst box, and the ammonia / air mixing chamber is arranged at the bottom of the catalytic combustion unit. The upper catalyst box is a denitration catalyst layer box, and a second catalyst bed is arranged in the upper catalyst box, the catalyst adopts a suitable honeycomb catalyst, and the waste gas pipe is connected with the upper catalyst box. The lower catalyst box is a VOC catalyst layer box, and a first catalyst bed is arranged in the lower catalyst box, and the first catalyst bed and the second catalyst bed are arranged in a series connection mode, and the concentrated waste gas pipe is connected with the lower catalyst box.

4. A rotary concentration VOC coupled denitration purification device according to claim 3, characterized in that: The exhaust pipe and the concentrated exhaust pipe are provided with an ammonia injection device for simultaneously treating NOx and dioxin in the exhaust gas x and dioxin.

5. A rotary concentration VOC coupled denitration purification device according to claim 4, characterized in that: Manholes and catalyst installation doors are arranged on the upper catalyst box and the lower catalyst box.

6. A rotary concentration VOC coupled denitration purification device according to claim 5, characterized in that: Temperature sensors and real-time monitoring devices are arranged on the waste gas pipe, the concentrated waste gas pipe and the outlet of the catalytic combustion unit.

7. A rotary concentrated VOC coupled denitration purifier device according to claim 1, characterized in that: A heat preservation layer is arranged on the inner wall of the rotary concentration unit, and a heat preservation layer is also arranged on the outer layer of the heating pipeline.

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