CN210891704U - Hierarchical organic waste gas treatment system - Google Patents
Hierarchical organic waste gas treatment system Download PDFInfo
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- CN210891704U CN210891704U CN201921815117.XU CN201921815117U CN210891704U CN 210891704 U CN210891704 U CN 210891704U CN 201921815117 U CN201921815117 U CN 201921815117U CN 210891704 U CN210891704 U CN 210891704U
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Abstract
The embodiment of the utility model relates to the technical field of environmental protection, a hierarchical organic waste gas treatment system is disclosed, this system includes first heat exchange device, first order VOC treatment facility and second level VOC treatment facility, and first order VOC treatment facility is used for handling the higher and lower waste gas of temperature of concentration of production facility output and the lower and higher waste gas of temperature of output concentration, and this waste gas is handled through second level VOC treatment facility again, and first heat exchange device is used for carrying out the heat exchange treatment with the waste gas of production facility output and the waste gas of following first order VOC treatment facility output, the embodiment of the utility model discloses through adding heat exchange device in order to improve the inlet temperature of first order VOC treatment facility to, through carrying out the hierarchical processing to organic waste gas, can realize handling the clean emission after the organic waste gas of higher concentration.
Description
Technical Field
The embodiment of the utility model provides a relate to environmental protection technology field, especially relate to a hierarchical organic waste gas treatment system.
Background
At present, methods for treating VOC waste gas mainly comprise photocatalysis, catalytic combustion, biological methods, plasma, activated carbon and the like, but when the methods are used for treating VOC waste gas with large air volume and high concentration, the treatment efficiency is low or potential safety hazards exist.
In the market, the large-air-volume and high-concentration triphenyl, ketone and ester VOC waste gas is treated by adopting a combined process of activated carbon adsorption-catalytic combustion desorption, spraying, photolysis, activated carbon and the like or a method of firstly adopting an air reduction and thickening technology and then adopting catalytic combustion and the like.
However, when the waste gas with large air volume and medium and high concentration is treated, the combined process has high cost and poor purification capability, so the combined process is not beneficial to popularization and application; the method of adopting the air reduction and concentration increasing technology and adopting the catalytic combustion can convert the waste gas with large air volume and higher concentration into the waste gas with small air volume and higher concentration, and is easy to process, however, the method has larger potential safety hazard when processing the waste gas with higher concentration.
Disclosure of Invention
In order to solve the technical problem, the embodiment of the utility model provides a hierarchical organic waste gas treatment system to solve the technical problem that big amount of wind, higher concentration VOC waste gas are difficult to handle among the prior art.
In order to solve the above technical problem, the embodiment of the utility model provides a hierarchical organic waste gas treatment system is provided, include: a first heat exchange means; the first-stage VOC treatment equipment is used for communicating with production equipment through the first heat exchange device, the first heat exchange device is used for carrying out heat exchange treatment on first waste gas output by the production equipment and second waste gas output by the first-stage VOC treatment equipment, wherein the first waste gas after heat exchange is used as third waste gas and the second waste gas after heat exchange is used as fourth waste gas, the third waste gas is input into the first-stage VOC treatment equipment, so that the first-stage VOC treatment equipment treats the third waste gas to output the second waste gas, the temperature of the first waste gas is lower than that of the third waste gas, the temperature of the third waste gas is lower than that of the second waste gas, and the concentration of the first waste gas is higher than that of the second waste gas; and a second-stage VOC treatment facility for treating the fourth exhaust gas.
Optionally, the staged organic exhaust treatment system further comprises: a first gas conduit assembly communicating the production facility with the first heat exchange device for conveying the first exhaust gas; the second gas pipeline assembly is communicated with the first heat exchange device and the first-stage VOC treatment equipment and is used for conveying the third waste gas; a third gas conduit assembly communicating the first stage VOC treatment facility with the first heat exchange means for transporting the second exhaust gas; and a fourth gas pipeline assembly which is communicated with the first heat exchange device and the second-stage VOC treatment equipment and is used for transmitting the fourth waste gas.
Optionally, the first gas conduit assembly comprises: a first gas pipeline communicating the production facility with the first heat exchange device; the first induced draft fan is arranged on the first gas pipeline and used for introducing first waste gas output by the production equipment into the first heat exchange device through the first gas pipeline; and the first valve is arranged between the first induced draft fan and the first heat exchange device.
Optionally, the fourth gas conduit assembly comprises: a fourth gas conduit communicating the first heat exchange means with the second stage VOC treatment facility; a second valve disposed on the fourth gas conduit.
Optionally, the staged organic waste gas treatment system further comprises a fifth gas duct assembly, one end of the fifth gas duct assembly is communicated with the first partial duct between the first valve and the first heat exchange device, and the other end of the fifth gas duct assembly is communicated with the second partial duct between the second valve and the first heat exchange device, wherein when entering the preheating mode, when the first valve and the second valve are both turned off, the third gas duct assembly, the first heat exchange device, the second partial duct, the fifth gas duct assembly, the first partial duct, the first heat exchange device, and the second gas duct assembly constitute a preheating duct.
Optionally, the fifth gas conduit assembly comprises: one end of the fifth gas pipeline is communicated with the first partial pipeline, and the other end of the fifth gas pipeline is communicated with the second partial pipeline; and the third valve is arranged on the fifth gas pipeline.
Optionally, the staged organic waste gas treatment system further comprises a sixth gas pipeline assembly, one end of the sixth gas pipeline assembly is communicated with the second-stage VOC treatment equipment, and the other end of the sixth gas pipeline assembly is respectively communicated with the fourth gas pipeline assembly and an indoor space where the production equipment is located, wherein the indoor space has fifth waste gas.
Optionally, the sixth gas conduit assembly comprises: one end of the sixth gas pipeline is communicated with the second-stage VOC treatment equipment, and the other end of the sixth gas pipeline is respectively communicated with the fourth gas pipeline assembly and the indoor space where the production equipment is located; and the second induced draft fan is arranged on the sixth gas pipeline and used for introducing the fifth waste gas and the fourth waste gas into the second-stage VOC treatment equipment through the sixth gas pipeline.
Optionally, the graded organic waste gas treatment system further comprises a second heat exchange device, wherein the second heat exchange device is communicated with the first-stage VOC treatment equipment, the second-stage VOC treatment equipment and the production equipment respectively, and is used for performing heat exchange treatment on fourth waste gas and fresh air, inputting the fourth waste gas after the heat exchange treatment into the second-stage VOC treatment equipment, and inputting the fresh air after the heat exchange treatment into the production equipment.
Optionally, the staged organic exhaust treatment system further comprises: a seventh gas piping component that communicates the production facility with the second heat exchange apparatus; an eighth gas conduit assembly communicating the second stage VOC treatment facility with the second heat exchange means; and the third induced draft fan is arranged on the seventh gas pipeline assembly and used for introducing fresh air subjected to heat exchange treatment into the production equipment.
Optionally, the first-stage VOC treatment device is a microwave catalytic combustion furnace, and the third exhaust gas undergoes a catalytic combustion reaction in the first-stage VOC treatment device.
Optionally, a catalytic combustion agent is placed in the first-stage VOC treatment equipment, and the working temperature of the first-stage VOC treatment equipment is more than 150 ℃.
Optionally, the second-stage VOC treatment device is an activated carbon adsorption treatment device, and the fourth exhaust gas is discharged after being adsorbed by activated carbon in the second-stage VOC treatment device.
The embodiment of the utility model provides a beneficial effect is: the utility model provides a hierarchical organic waste gas treatment system, this system includes first heat exchange device, first order VOC treatment facility and second level VOC treatment facility, and first order VOC treatment facility is used for handling the higher and lower waste gas of output concentration of production facility output and the lower and higher waste gas of temperature of output concentration, and this waste gas is handled through second level VOC treatment facility again, and first heat exchange device is used for carrying out the heat exchange treatment with the waste gas of production facility output and the waste gas of following first order VOC treatment facility output, the embodiment of the utility model provides a through adding heat exchange device in order to improve the inlet air temperature of first order VOC treatment facility to, through carrying out stage treatment to organic waste gas, can realize handling the clean emission after the organic waste gas of higher concentration.
Drawings
The embodiments are illustrated by way of example only in the accompanying drawings, in which like reference numerals refer to similar elements and which are not to be construed as limiting the embodiments, and in which the figures are not to scale unless otherwise specified.
FIG. 1 is a schematic structural diagram of a staged organic waste gas treatment system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a staged organic waste gas treatment system according to another embodiment of the present invention;
FIG. 3 is a schematic diagram of an application environment of a microwave catalytic combustion processing apparatus according to an embodiment of the present invention;
fig. 4 is a perspective view of a microwave catalytic combustion processing apparatus provided in an embodiment of the present invention;
fig. 5 is a perspective view of another angle of a microwave catalytic combustion processing apparatus according to an embodiment of the present invention;
fig. 6 is an exploded view of a microwave catalytic combustion processing apparatus according to an embodiment of the present invention;
fig. 7 is a schematic longitudinal cross-sectional view of a microwave catalytic combustion processing apparatus according to an embodiment of the present invention;
fig. 8 is a top view of a microwave catalytic combustion processing apparatus provided in an embodiment of the present invention;
FIG. 9 is a schematic view of one of the microwave generating assemblies of FIG. 7;
FIG. 10 is a schematic view of an insulation layer of FIG. 4;
fig. 11 is a schematic view of a safety valve of fig. 5.
Detailed Description
In order to facilitate understanding of the invention, the following description is given in conjunction with the accompanying drawings and the embodiments, in order to explain the invention in more detail. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "top," "bottom," "upper," "lower," "left," "right," and the like as used herein are for descriptive purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a staged organic waste gas treatment system according to an embodiment of the present invention. As shown in fig. 1, the staged organic waste gas treatment system 100 includes a first heat exchange device 11, a first VOC treatment device 12, and a second VOC treatment device 13, the first VOC treatment device 12 is used to communicate with the production device through the first heat exchange device, the first heat exchange device 11 is used to perform heat exchange treatment on the first waste gas output by the production device and the second waste gas output by the first VOC treatment device 12, wherein the first waste gas after heat exchange is used as a third waste gas and the second waste gas after heat exchange is used as a fourth waste gas, and the third waste gas is input to the first VOC treatment device 12, so that the third VOC treatment device 12 treats the third waste gas to output the second waste gas, the temperature of the first waste gas is lower than that of the third waste gas, the temperature of the third waste gas is lower than that of the second waste gas, and the concentration of the first waste gas is higher than that of the second waste gas, the second-stage VOC treatment device 13 is used to treat the fourth exhaust gas.
In this embodiment, the first-stage VOC treatment device 12 is configured to output a higher-concentration exhaust gas after treating an input higher-concentration lower-temperature exhaust gas, and the first exhaust gas output by the production device has a higher concentration and a lower temperature, in one case, the temperature of the first exhaust gas is room temperature, in another case, the temperature of the first exhaust gas is between 40 ℃ and 80 ℃, although in other cases, the temperature of the first exhaust gas may have other values, which is not limited herein. The first waste gas is first input into the first heat exchanging device 11 to exchange heat with the second waste gas with lower concentration and higher temperature output from the first-stage VOC treatment equipment 12, and in some cases, the temperature of the second waste gas may be 200 to 400 ℃, for example, 220 ℃, 260 ℃, 300 ℃, 350 ℃, 400 ℃ and the like, which is not limited herein. After heat exchange treatment, the temperature of the first waste gas is raised to 100-200 ℃, and the first waste gas can be used as third waste gas to be input into the first-stage VOC treatment equipment 12. The temperature of the second exhaust gas is reduced, for example, to 150 to 200 ℃ in some cases, and is supplied as a fourth exhaust gas to the second-stage VOC treatment device 13. Second level VOC treatment facility 13 is used for handling the clean emission of back to the fourth waste gas, consequently, first waste gas can carry out the heat exchange through first heat exchange device 11 and second waste gas to obtain the third waste gas that the temperature promoted by a wide margin, compare in first waste gas direct input to first level VOC treatment facility 12, the third waste gas can shorten first level VOC treatment facility 12's heating time because the temperature rises, can reach reaction temperature more fast, thereby effectively reduce the energy consumption. Through carrying out the processing of first order VOC treatment facility 12 and second level VOC treatment facility 13 to organic waste gas, can realize handling the clean emission of back to the organic waste gas of higher concentration, reduce or even eliminate the pollution to the environment.
The first heat exchanging device 11 may be any device or apparatus for exchanging heat between gases, such as a shell-and-tube heat exchanger, a double-tube heat exchanger, etc., which is a recuperative heat exchanger, and has a principle that two fluids with different temperatures flow in a space separated by a wall surface, and heat is transferred between the two fluids by heat conduction through the wall surface and convection of the fluids on the wall surface, or a regenerative heat exchanger, which has a principle that heat is transferred from a high-temperature fluid to a low-temperature fluid, and a heat medium is heated to a certain temperature by heating a solid substance, and then a cold medium is heated by the solid substance, so that the heat transfer is achieved, or other heat exchangers for exchanging heat between gases.
The second-stage VOC treatment device 13 may employ any method capable of treating at least a relatively low concentration of organic waste gas, such as a microwave ultraviolet method, an activated carbon adsorption method, a biological method, a plasma method, and the like.
The first stage VOC treatment device 12 may be any device or equipment capable of converting higher concentration organic waste gas to lower concentration organic waste gas, such as a catalytic combustion device using a catalytic combustion process.
In some embodiments, as shown in fig. 1, the staged organic waste gas treatment system 100 further includes a first gas duct assembly 15, a second gas duct assembly 16, a third gas duct assembly 17, and a fourth gas duct assembly 18, the first gas duct assembly 16 communicating the production facility with the first heat exchange device 11, the second gas duct assembly 17 communicating the first heat exchange device 11 with the first stage VOC treatment facility 12, the third gas duct assembly 17 communicating the first stage VOC treatment facility 12 with the first heat exchange device 11, and the fourth gas duct assembly 18 communicating the first heat exchange device with the second stage VOC treatment facility 13.
Specifically, the production facility transmits the first waste gas to the first heat exchange device 11 through the first gas pipeline assembly 15, the first heat exchange device 11 transmits the third waste gas to the first-stage VOC treatment equipment 12 through the second gas pipeline assembly 16, the first-stage VOC treatment equipment 12 transmits the second waste gas to the first heat exchange device 11 through the third gas pipeline assembly 17, and the first heat exchange device 11 transmits the fourth waste gas to the second-stage VOC treatment equipment 13 through the fourth gas pipeline assembly 18.
In some embodiments, the first gas pipeline assembly 15 includes a first gas pipeline 152, a first induced draft fan 154 and a first valve 156, the first gas pipeline 152 communicates the production equipment and the first heat exchange device 11, the first induced draft fan 154 is disposed on the first gas pipeline 15, and the first valve 156 is disposed between the first induced draft fan 154 and the first heat exchange device 11.
Specifically, the first induced draft fan 154 is used for introducing the first exhaust gas output by the production equipment into the first heat exchange device 11 through the first gas pipeline 15 so as to perform heat exchange on the first exhaust gas, the first valve 156 is used for communicating or blocking a passage of the first exhaust gas output by the production equipment, which is input to the first heat exchange device 11, wherein the air volume of the first induced draft fan 154 is 1000m3/h～3000m3It can be understood that, when the first valve 156 is opened, the first exhaust gas fed to the first heat exchanging arrangement 11 has a high concentration and a large air volume.
In some embodiments, the fourth gas conduit assembly 18 includes a fourth gas conduit 182 and a second valve 184, the fourth gas conduit 18 communicating the first heat exchange device 11 with the second stage VOC treatment apparatus 13, the second valve 184 being disposed on the fourth gas conduit 18.
Specifically, the fourth gas pipeline 18 inputs the fourth waste gas output from the first heat exchange device 11 to the second-stage VOC treatment device 13, so that the second-stage VOC treatment device 13 treats the fourth waste gas, and the second valve 184 is used for communicating or blocking the passage of the fourth waste gas output from the first heat exchange device 11 to the second-stage VOC treatment device 13.
In some embodiments, the staged organic waste gas treatment system 100 further includes a fifth gas conduit assembly 19, one end of the fifth gas conduit assembly 19 is in communication with the first portion of the conduit between the first valve 156 and the first heat exchange device 11, and the other end of the fifth gas conduit assembly is in communication with the second portion of the conduit between the second valve 184 and the first heat exchange device 11.
Specifically, in the preheating mode, the first valve 156 and the second valve 184 are both closed, and the third gas piping assembly 17, the first heat exchanging device 11, the second partial piping, the fifth gas piping assembly 19, the first partial piping, the first heat exchanging device 11, and the second gas piping assembly 16 constitute a preheating piping.
In some embodiments, the fifth gas pipeline assembly 19 includes a fifth gas pipeline 192 and a third valve 194, one end of the fifth gas pipeline 192 is connected to the first partial pipeline, the other end of the fifth gas pipeline 192 is connected to the second partial pipeline, and the third valve 194 is disposed on the fifth gas pipeline 19.
Specifically, the third valve 194 is used for communicating or blocking a passage through which fourth waste gas output by the first heat exchanger 11 is input to the first heat exchanger 11, in the preheating mode, the first valve 156 and the second valve 184 are in an off state, the third valve 194 is in an on state, after preheating is completed, the first valve 156 and the second valve 184 are turned on, the third valve 194 is turned off, at this time, the first induced draft fan 154 introduces the first waste gas output by the production equipment into the first heat exchanger 11 through the first gas pipeline assembly 15, the first waste gas forms third waste gas after heat exchange, the third waste gas is input to the first-stage VOC treatment equipment 12 and performs catalytic combustion reaction with a catalyst, after the reaction is completed, the first-stage VOC treatment equipment 12 outputs second waste gas, the second waste gas is input to the first heat exchanger 11 through the second gas pipeline assembly 16, and the second waste gas after heat exchange treatment forms fourth waste gas, the fourth exhaust gas is input to the second-stage VOC treatment equipment 13 through the fourth pipe assembly 18, and the second-stage VOC treatment equipment 13 treats the fourth exhaust gas and then cleanly discharges the fourth exhaust gas.
In some embodiments, the staged organic waste gas treatment system 100 further includes a sixth gas duct assembly 20, wherein the sixth gas duct assembly 20 is in communication with the second stage VOC treatment device 13 at one end and with the fourth gas duct assembly 18 and the interior space of the production facility, respectively, at the other end.
Wherein the indoor space has a fifth flue gas, the fifth flue gas being a gas that overflows from the production facility into the indoor space, it being understood that the fifth flue gas is a low concentration flue gas.
In some embodiments, the sixth gas pipeline assembly 20 includes a sixth gas pipeline 202 and a second induced draft fan 204, one end of the sixth gas pipeline 202 is communicated with the second-stage VOC treatment device 13, and the other end is respectively communicated with the fourth gas pipeline assembly 18 and the indoor space where the production equipment is located, and the second induced draft fan 204 is disposed on the sixth gas pipeline 20 and is used for introducing the fifth waste gas and the fourth waste gas into the second-stage VOC treatment device 13 through the sixth gas pipeline assembly 20.
Wherein, the air volume of the second induced draft fan 204 is 10000m3/h～100000m3And h, it can be understood that the air volume of the mixed gas composed of the fourth waste gas and the fifth waste gas is large, the concentration is low, therefore, the fourth waste gas formed after the first waste gas with high concentration and large air volume passes through the first-stage VOC treatment equipment 12 and the first heat exchange device 11 is mixed with the fifth waste gas to form the mixed gas with low concentration and large air volume, and the mixed gas is treated by the second-stage VOC treatment equipment 13 and then is discharged cleanly, so that the problem that the VOC waste gas with large air volume and high concentration is difficult to treat can be solved, and the potential safety hazard is greatly reduced.
In some embodiments, referring to fig. 2, fig. 2 is a schematic structural diagram of a staged organic waste gas treatment system according to another embodiment of the present invention. As shown in fig. 2, the staged organic waste gas treatment system 100 further includes a second heat exchange device 21, wherein the second heat exchange device 21 is respectively communicated with the first-stage VOC treatment device 12, the second-stage VOC treatment device 13 and the production device, and is configured to perform heat exchange treatment on the fourth waste gas and the fresh air, input the heat-exchanged fourth waste gas into the second-stage VOC treatment device 13, and input the heat-exchanged fresh air into the production device.
In some embodiments, the staged organic waste gas treatment system 100 further includes a seventh gas piping assembly 22, an eighth gas piping assembly 23, and a third induced draft fan 24, wherein the seventh gas piping assembly 22 communicates the production facility with the second heat exchanging device 21, the eighth gas piping assembly 23 communicates the second-stage VOC treatment facility 13 with the second heat exchanging device 21, and the third induced draft fan 24 is disposed on the seventh gas piping assembly 22 and is used for introducing the fresh air after the heat exchanging treatment into the production facility.
Specifically, the fourth exhaust gas is input into the second heat exchanging device 21 through the fourth gas pipeline assembly 18 to exchange heat with the fresh air, the second heat exchanging device 21 can lower the temperature, for example, the fresh air at the temperature of 0-60 ℃ exchanges heat with the fourth waste gas at the temperature of 100-200 ℃ for example, the temperature of the fresh air after heat exchange is greatly increased to form hot air, for example, between 50 ℃ and 160 ℃, the hot air is introduced into the production equipment through the third induced draft fan 24 and the seventh gas pipeline component 22, for use in the production facility, the fourth exhaust gas after heat exchange is input to the second-stage VOC treatment facility 13 through the eighth gas piping component 23, therefore, the fresh air and the fourth waste gas are subjected to heat exchange treatment through the second heat exchange device 21 to provide hot air for the production equipment, so that the heating energy consumption of the production equipment is reduced.
In some embodiments, the first stage VOC treatment device 12 is a microwave catalytic combustion furnace and the third exhaust gas undergoes a catalytic combustion reaction in the first stage VOC treatment device.
In some embodiments, a catalytic combustion agent is disposed in the first stage VOC treatment device 12 and the first stage VOC treatment device operates at a temperature above 150 ℃.
The microwave catalytic combustion furnace is used for providing a catalytic combustion reaction place for the third waste gas and the catalytic combustion agent, and can convert the organic waste gas with higher concentration into the organic waste gas with lower concentration.
The catalytic combustion reaction of the flue gas and the catalytic combustion agent in the first-stage VOC treatment device 12 is carried out under certain temperature conditions, the reaction temperature is different for different types of flue gas, and is above 150 ℃ for most of the flue gas, but the reaction temperature can reach 500 ℃ for some of the flue gas, so the maximum reaction temperature of the flue gas is not limited herein.
The first-stage VOC treatment equipment 12 is specifically a microwave catalytic combustion treatment device as shown in fig. 3 to 8.
Referring to fig. 3, fig. 3 is a schematic view of an application environment of a microwave catalytic combustion processing apparatus according to an embodiment of the present invention. As shown in fig. 3, the application environment includes a microwave catalytic combustion processing device 200 and a control device 300, and the microwave catalytic combustion processing device 200 and the control device 300 are connected by a wire. The control device 300 is used to control the microwave catalytic combustion processing device 200. The control device 300 includes any controller or logic device that can perform processing or control functions, such as a Programmable Logic Controller (PLC), an application specific integrated circuit device (ASIC), a digital signal processing Device (DSP), a Field Programmable Gate Array (FPGA), a Microcontroller (MCU), or the like. The control device 300 may monitor the operation condition of the microwave catalytic combustion processing device 200 in real time and perform local or remote control by inputting control instructions, such as a button, a mouse, a keyboard, a touch screen, and the like, so as to enable the microwave catalytic combustion processing device 200 to perform one or more operations.
Referring to fig. 4 to 11, the microwave catalytic combustion processing apparatus 200 includes a cavity 201, a catalytic carrier 202, a microwave generating assembly 203, a microwave shielding assembly 204, a frame 205, a first heat dissipating assembly 206, a microwave power source 207, a second heat dissipating assembly 208, a third heat dissipating assembly 209, an insulating layer 210, and a safety air valve 211.
In some embodiments, referring to fig. 7, the microwave catalytic combustion processing apparatus 200 includes a chamber 201, a catalytic carrier 202, and a microwave generating assembly 203. The cavity 201 comprises an air inlet and an air outlet, and the longitudinal section of the cavity 201 is octagonal or shuttle-like. The catalytic carrier 202 is disposed inside the cavity 201, and the catalytic carrier 202 is coated with a catalyst. The microwave generating assembly 203 comprises a plurality of microwave generators, the plurality of microwave generators are arranged on the cavity 201, and one microwave generator of any two adjacent microwave generators rotates according to a preset angle, and can rotate to the arrangement position of the other microwave generator and coincide with the other microwave generator.
In the present embodiment, several microwave generators in the microwave generating assembly 203 are disposed on the cavity 201. One of any two adjacent microwave generators rotates according to a preset angle, and the microwave generators can rotate to the arrangement position of the other microwave generator and coincide with the other microwave generator. For example, one microwave generator is fixed in two adjacent microwave generators, then the microwave generator rotates by a preset angle to obtain the arrangement position of the other microwave generator, and the other microwave generator rotates by the same angle to obtain the other microwave generator adjacent to the other microwave generator, and the arrangement mode of the plurality of microwave generators arranged on the side surface of the cavity 201 is optimized, and the longitudinal section of the cavity 201 is designed into an octagon shape or an imitation shuttle shape by simulation software, so that the uniform distribution of microwaves in the cavity 201 can be ensured, the full catalytic combustion reaction of waste gas and a catalyst can be facilitated, and the waste gas treatment efficiency can be improved.
In one embodiment, the catalyst is used for catalytic reaction with the exhaust gas, the cavity 201 is used for providing a place for catalytic reaction of the catalyst with the exhaust gas, and the microwave generator is used for generating microwaves to heat the exhaust gas or the catalyst in the cavity 201. The waste gas can be input into the cavity 201 through the gas inlet, and after the catalytic reaction, the waste gas is output to the outside of the cavity 201 through the gas outlet. The exhaust gas contains Volatile Organic Compounds (VOCs), such as benzene-based compounds, organic chlorides, organic ketones, organic esters, and the like. The catalyst can perform catalytic reaction with volatile organic compounds and oxidize and decompose combustible substances in the volatile organic compounds, and can be a noble metal catalyst, a metal oxide catalyst, a noble metal-transition metal oxide catalyst and the like. The catalytic support 202 may be a metal oxide support, a molecular sieve support, a glass support, a ceramic support, activated carbon, or the like.
In some embodiments, the gas outlet and the gas inlet are arranged in a vertical direction of the cavity 201 in opposite directions, so that the convection of the reaction gas can be ensured. Particularly, gas outlet and gas inlet distribute about on cavity 201, can guarantee that reaction gas goes up into down to go out or goes into down to go out, through the inside catalytic carrier 202 that sets up of cavity 201 for gas keeps unobstructed at heating reaction and circulation in-process, can fully react with the catalyst on catalytic carrier 202, and the problem that partial waste gas piles up and can not obtain catalytic reaction can not appear.
In some embodiments, referring to fig. 6 to 8, the cavity 201 includes a plurality of upper side surfaces inclined with respect to a central axis of the cavity 201, the number of the microwave generating assemblies 203 is plural, and at least one microwave generating assembly 203 is disposed on each upper side surface. Specifically, the cavity 201 includes 4 upper side surfaces, and each upper side surface is provided with a microwave generating assembly 203. Of course, in other embodiments, each upper end side surface may be provided with 2, 3 or 4 microwave generating assemblies 203, which is not limited herein.
Further, any two adjacent microwave generators in the microwave generating assembly 203 are arranged on each corresponding upper end side face in an orthogonal distribution in pairs. Referring to the embodiment shown in fig. 9, the microwave generator assembly 203 comprises 4 microwave generators, each microwave generator being orthogonally disposed with respect to any adjacent microwave generator. The distribution of microwave generator cooperates with the structural design of cavity 201, can reach the effect that the ripples is presented to the multiaspect, makes the inside electric field distribution of cavity 201 more even to guarantee the homogeneity of microwave heating in bulky cavity, reach the exhaust-gas treatment effect of preferred.
In some embodiments, referring to fig. 6 and 7, the catalytic substrate 202 is horizontally disposed in the cavity 201.
In some embodiments, the air inlet is disposed at one of the upper end or the lower end of the cavity 201, and the air outlet is disposed at the other. For example, in some cases, the air inlet is disposed at an upper portion of the cavity 201, the air outlet is disposed at a lower portion of the cavity 201, and the air inlet and the air outlet are disposed opposite to each other. In another case, the air inlet may be disposed at a lower portion of the cavity 201, and the air outlet is disposed at an upper portion of the cavity 201.
Further, the air inlet is combined with one of the upper end side surface or the lower end side surface of the cavity 201 to form a horn shape, and the air outlet is combined with the other of the upper end side surface or the lower end side surface of the cavity 201 to form a horn shape. Through such setting, can make the waste gas that gets into cavity 201 diffuse in cavity 201 through cavity structures rapidly for area of contact with catalytic carrier 202 is great, and after the reaction was accomplished, the bell mouth can collect the gas after the reaction again, can concentrate and give vent to anger.
Further, when exhaust enters from the air inlet, the exhaust can be in full contact with a catalyst coated on the catalytic carrier 202 through the catalytic carrier 202 horizontally arranged in the cavity 201, and the catalytic combustion reaction efficiency is improved. Moreover, since the microwave generating assembly 203 is disposed on each upper end side of the cavity 201, the catalytic carrier 202 is horizontally disposed in the cavity 201, so that a maximum radiation surface exists between the catalytic carrier 202 and the microwave emitted from the microwave generator of the microwave generating assembly 203. On the one hand, under the preheating mode, can shorten the time of reaching reaction temperature when heating the temperature of cavity 201, can reduce the heating energy consumption, enter the heat preservation mode afterwards, keep the inside temperature of cavity 201 in the predetermined range to promote the catalytic reaction in the cavity 201. On the other hand, when the waste gas and the catalyst are subjected to catalytic combustion reaction, the waste gas and the catalyst can be uniformly heated, so that the catalytic combustion reaction tends to be complete, and the catalytic combustion reaction efficiency is further improved.
When the preheating mode is started, the specific type of exhaust gas is treated first to determine the temperature condition required for the catalytic reaction of the specific type of exhaust gas, the control device 300 sets a fixed temperature and outputs an instruction corresponding to the fixed temperature to the microwave power supply 207, the microwave power supply 207 drives the microwave generator to emit microwaves, and the output power of the microwave generator is adjusted to enter the preheating mode to heat the temperature of the cavity 201 to a predetermined temperature.
When the temperature of the cavity 201 is heated to a predetermined temperature, the heat preservation mode is entered, the controller controls the microwave power supply 207 to correspondingly adjust the microwave output power of the microwave generator, and the microwave generator emits microwaves corresponding to the output power into the cavity 201, so that the internal temperature of the cavity 201 is kept within a preset range.
In some embodiments, referring to fig. 7 again, the microwave catalytic combustion processing apparatus 200 further includes a microwave shielding assembly 204, and the microwave shielding assembly 204 is disposed at the air inlet and the air outlet.
In the present embodiment, the microwave shielding assembly 204 (not shown) includes a first microwave shielding wall 2041 and a second microwave shielding wall 2042, the first microwave shielding wall 2041 is laid at the air inlet or the air outlet along the transverse cross section, and the second microwave shielding wall 2042 is laid at the air inlet or the air outlet along the transverse cross section, so as to prevent the internal microwaves of the cavity 201 from leaking to the outside of the cavity 201 through the air inlet or the air outlet. The first microwave shielding wall 2041 and the second microwave shielding wall 2042 may be made of metal having any shape, such as plate, sheet or net, for reflecting and scattering microwaves to greatly attenuate the microwave radiation effect, and may further be microwave-absorbed by using an absorbing material to absorb microwave radiation in a specific frequency range.
In some embodiments, referring to fig. 4 to 6, the microwave catalytic combustion processing apparatus 200 further includes a frame 205 and a first heat dissipation assembly 206, wherein the first heat dissipation assembly 206 is mounted on the frame 205 and surrounds the cavity 201. Frame 205 includes base 2051, main body frame 2052 and cargo platform 2053, and base 2051 and main body frame 2052 fixed connection, main body frame 2052 are used for fixed cavity 201, and base 2051 is used for supporting cavity 201, and cargo platform 2053 installs on frame 205.
The first heat dissipation assembly 206 is a water-cooling heat dissipation assembly, and a water-cooling pipe in the water-cooling heat dissipation assembly is installed on the lower end surface of the object platform 2053 and surrounds the cavity 201, so as to dissipate heat for the microwave generators installed on each upper end side surface of the cavity 201, and ensure that the microwave generators normally operate.
In some embodiments, referring to fig. 4 to 6, the microwave catalytic combustion processing apparatus 200 further includes a microwave power supply 207 and a second heat dissipation assembly 208, wherein the microwave power supply 207 is electrically connected to each microwave generator, and the second heat dissipation assembly 208 is connected to the microwave power supply 207 for dissipating heat of the microwave power supply 207.
The microwave power supply 207 is further connected to a controller, and the controller is configured to adjust the output power of each microwave generator and drive each microwave generator to emit microwaves corresponding to the output power of the microwave generator by controlling the microwave power supply 207.
The second heat dissipation assembly 208 is an air-cooled heat dissipation assembly.
In some embodiments, referring to fig. 6, the microwave catalytic combustion processing apparatus 200 further includes a third heat sink 209, and the third heat sink 209 is mounted on the cavity 201 and connected to each microwave generator.
The third heat dissipation assembly 209 is provided with a heat dissipation channel for dissipating heat for each microwave generator, thereby ensuring that each microwave generator operates normally.
In some embodiments, the third heat dissipation assembly 209 is a water-cooled waveguide.
The water-cooling waveguide is provided with a water-cooling heat dissipation channel and used for dissipating heat of each microwave generator, and the water-cooling waveguide is arranged on the cavity 1 and used for transmitting microwaves emitted by each microwave generator to the inside of the cavity 1 so as to heat waste gas and catalyst or keep the internal temperature of the cavity 1 stable within a preset range.
In some embodiments, referring to fig. 4, fig. 6, fig. 7 and fig. 10, the microwave catalytic combustion processing apparatus 200 further includes an insulating layer 210, and the insulating layer 210 covers an outer wall of the cavity 201.
The insulating layer 210 is used for insulating the cavity 201, and may include any high temperature resistant or insulating material, such as rock wool material, aluminum silicate material, and the like.
In some embodiments, referring to fig. 5, fig. 6, fig. 8 and fig. 11, the microwave catalytic combustion processing apparatus 200 further includes a safety valve 211, the safety valve 211 is installed in the cavity 201, and when the internal air pressure of the cavity 201 is greater than a preset threshold, the safety valve 211 releases the internal air pressure of the cavity 201, so as to ensure that the microwave catalytic combustion processing apparatus 200 operates safely.
In some embodiments, referring to fig. 4 and 6, the control device 300 further includes a temperature detecting assembly, which includes a first temperature sensor 301, a second temperature sensor 302 and a third temperature sensor (not shown), the temperature detecting assembly is installed on the air inlet pipe communicated with the air inlet, the air outlet pipe communicated with the air outlet and the catalytic substrate 202, for detecting the temperature of the first gas entering the gas inlet, the temperature of the second gas exiting the gas outlet, and the temperature of the carrier of the catalytic carrier 202, the temperature detection assembly being connected to the controller, the temperature detection assembly detecting the temperature of the first gas, the temperature of the second gas, and the temperature of the carrier in real time, and feeds back the detection result to a controller, and the controller is used for controlling the microwave power supply 207 to adjust the output power of the microwave generator in time according to the first gas temperature, the second gas temperature and the carrier temperature. For example, when the temperature detecting assembly detects that the first gas temperature, the second gas temperature or the carrier temperature is lower than the preset threshold, the controller appropriately increases the output power of the microwave generator by controlling the microwave power supply 207, and the microwave generator heats the exhaust gas or increases the internal temperature of the cavity 201 by emitting corresponding microwaves into the cavity 201, thereby providing a better temperature condition for the catalytic reaction of the exhaust gas and the catalyst, so that the reaction tends to be complete, and the treatment effect of the exhaust gas is improved.
In some embodiments, the second-stage VOC treatment device 13 is an activated carbon adsorption treatment device, and the fourth exhaust gas is exhausted after being adsorbed by activated carbon in the second-stage VOC treatment device 13.
The active carbon adsorption treatment device is suitable for treating organic waste gas with large air volume and low concentration, the organic waste gas can be aliphatic and aromatic hydrocarbons, common alcohols, partial ketones, esters and the like, and the mixed waste gas formed by the fourth waste gas and the fifth waste gas forms the organic waste gas with large air volume and low concentration under the action of the second draught fan, so that the second-stage VOC treatment equipment can effectively treat the fourth waste gas or the fifth waste gas and can realize clean emission.
Finally, it is to be understood that the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, which are intended as additional limitations on the scope of the invention, as these embodiments are provided so that the disclosure will be thorough and complete. In addition, under the thought of the utility model, the above technical features are combined with each other continuously, and many other changes of the above utility model in different aspects are considered as the scope recorded in the specification of the utility model; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.
Claims (13)
1. A staged organic waste gas treatment system, comprising:
a first heat exchange means;
the first-stage VOC treatment equipment is used for communicating with production equipment through the first heat exchange device, the first heat exchange device is used for carrying out heat exchange treatment on first waste gas output by the production equipment and second waste gas output by the first-stage VOC treatment equipment, wherein the first waste gas after heat exchange is used as third waste gas and the second waste gas after heat exchange is used as fourth waste gas, the third waste gas is input into the first-stage VOC treatment equipment, so that the first-stage VOC treatment equipment treats the third waste gas to output the second waste gas, the temperature of the first waste gas is lower than that of the third waste gas, the temperature of the third waste gas is lower than that of the second waste gas, and the concentration of the first waste gas is higher than that of the second waste gas; and
a second stage VOC treatment facility for treating the fourth exhaust.
2. The system of claim 1, further comprising:
a first gas conduit assembly communicating the production facility with the first heat exchange device for conveying the first exhaust gas;
the second gas pipeline assembly is communicated with the first heat exchange device and the first-stage VOC treatment equipment and is used for conveying the third waste gas;
a third gas conduit assembly communicating the first stage VOC treatment facility with the first heat exchange means for transporting the second exhaust gas; and
and the fourth gas pipeline assembly is communicated with the first heat exchange device and the second-stage VOC treatment equipment and is used for transmitting the fourth waste gas.
3. The system of claim 2, wherein the first gas conduit assembly comprises:
a first gas pipeline communicating the production facility with the first heat exchange device;
the first induced draft fan is arranged on the first gas pipeline and used for introducing first waste gas output by the production equipment into the first heat exchange device through the first gas pipeline;
and the first valve is arranged between the first induced draft fan and the first heat exchange device.
4. The system of claim 3, wherein the fourth gas conduit assembly comprises:
a fourth gas conduit communicating the first heat exchange means with the second stage VOC treatment facility;
a second valve disposed on the fourth gas conduit.
5. The system of claim 4, further comprising a fifth gas conduit assembly, one end of the fifth gas conduit assembly being in communication with the first portion of the conduit between the first valve and the first heat exchange device, the other end of the fifth gas conduit assembly being in communication with the second portion of the conduit between the second valve and the first heat exchange device, wherein upon entering a preheat mode, the third gas conduit assembly, the first heat exchange device, the second portion of the conduit, the fifth gas conduit assembly, the first portion of the conduit, the first heat exchange device, and the second gas conduit assembly constitute a preheat conduit when both the first valve and the second valve are closed.
6. The system of claim 5, wherein the fifth gas conduit assembly comprises:
one end of the fifth gas pipeline is communicated with the first partial pipeline, and the other end of the fifth gas pipeline is communicated with the second partial pipeline;
and the third valve is arranged on the fifth gas pipeline.
7. The system of claim 2, further comprising a sixth gas piping assembly, one end of said sixth gas piping assembly being in communication with said second stage VOC treatment device and the other end being in communication with an indoor space in which said fourth gas piping assembly and said production device are located, respectively, wherein a fifth exhaust gas is present in said indoor space.
8. The system of claim 7, wherein the sixth gas conduit assembly comprises:
one end of the sixth gas pipeline is communicated with the second-stage VOC treatment equipment, and the other end of the sixth gas pipeline is respectively communicated with the fourth gas pipeline assembly and the indoor space where the production equipment is located;
and the second induced draft fan is arranged on the sixth gas pipeline and used for introducing the fifth waste gas and the fourth waste gas into the second-stage VOC treatment equipment through the sixth gas pipeline.
9. The system according to any one of claims 1 to 8, further comprising a second heat exchange device, said second heat exchange device being in communication with said first VOC treatment device, said second VOC treatment device and said production device, respectively, for heat exchanging said fourth exhaust gas with fresh air, feeding said heat exchanged fourth exhaust gas to said second VOC treatment device, and feeding said heat exchanged fresh air to said production device.
10. The system of claim 9, further comprising:
a seventh gas piping component that communicates the production facility with the second heat exchange apparatus;
an eighth gas conduit assembly communicating the second stage VOC treatment facility with the second heat exchange means;
and the third induced draft fan is arranged on the seventh gas pipeline assembly and used for introducing fresh air subjected to heat exchange treatment into the production equipment.
11. The system of any of claims 1-8, wherein said first stage VOC treatment device is a microwave catalytic combustion furnace and said third exhaust gas undergoes a catalytic combustion reaction in said first stage VOC treatment device.
12. The system of claim 11, wherein said first stage VOC treatment device has a catalytic combustion agent disposed therein, said first stage VOC treatment device operating at a temperature above 150 ℃.
13. The system according to any one of claims 1 to 8, wherein said second-stage VOC treatment apparatus is an activated carbon adsorption treatment device, and said fourth exhaust gas is discharged after being adsorbed by activated carbon in said second-stage VOC treatment apparatus.
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| CN201921815117.XU CN210891704U (en) | 2019-10-25 | 2019-10-25 | Hierarchical organic waste gas treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110671709A (en) * | 2019-10-25 | 2020-01-10 | 深圳麦格米特电气股份有限公司 | Hierarchical organic waste gas treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671709A (en) * | 2019-10-25 | 2020-01-10 | 深圳麦格米特电气股份有限公司 | Hierarchical organic waste gas treatment system |
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