CN214389519U - VOCs adsorbs concentrated clean system - Google Patents
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- CN214389519U CN214389519U CN202023261187.0U CN202023261187U CN214389519U CN 214389519 U CN214389519 U CN 214389519U CN 202023261187 U CN202023261187 U CN 202023261187U CN 214389519 U CN214389519 U CN 214389519U
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Abstract
本实用新型公开了一种VOCs吸附浓缩净化系统，属于废气处理领域。该系统包括包含吸附区、脱附区和冷却区的吸附转轮、与所述吸附转轮的吸附区连接的废气入口管路和废气出口管路、与所述吸附转轮的脱附区连接的脱附气入口管路和脱附气出口管路，还包括由所述废气入口管路引出的冷却区废气管路，所述冷却区废气管路穿过所述冷却区。该系统针对高浓度且难吸附物质的工况，通过设计冷却区废气管路和回风管路，一方面持续对冷却区进行冷却，另一方面不断对浓缩废气进行再浓缩；同时，设计了深度冷却风管路和深度冷却区，进一步保证了吸附效果和净化效率，降低了后端焚烧或催化设备的投资规格、装机功率和运行能耗。
The utility model discloses a VOCs adsorption, concentration and purification system, which belongs to the field of waste gas treatment. The system comprises an adsorption runner including an adsorption zone, a desorption zone and a cooling zone, an exhaust gas inlet pipeline and an exhaust gas outlet pipeline connected to the adsorption zone of the adsorption runner, and connected to the desorption zone of the adsorption runner The desorption gas inlet pipeline and the desorption gas outlet pipeline also include a cooling zone exhaust gas pipeline led out from the exhaust gas inlet pipeline, and the cooling zone exhaust gas pipeline passes through the cooling zone. For the working conditions of high concentration and difficult-to-adsorb substances, the system designs the exhaust gas pipeline and return air pipeline in the cooling area to continuously cool the cooling area on the one hand, and re-concentrate the concentrated exhaust gas on the other hand. The deep cooling air pipeline and deep cooling area further ensure the adsorption effect and purification efficiency, and reduce the investment specifications, installed power and operating energy consumption of back-end incineration or catalytic equipment.
Description
Technical Field
The utility model relates to a waste gas treatment field, concretely relates to VOCs adsorbs concentrated clean system.
Background
VOCs refer to various volatile organic compounds with boiling points of 50-260 ℃ at normal temperature. Most VOCs have unpleasant special odor and have toxic, irritant, teratogenic and carcinogenic effects, and particularly benzene, toluene, formaldehyde and the like cause great harm to human health. VOCs are important precursors causing urban dust haze and photochemical smog and mainly come from the processes of coal chemical industry, petrochemical industry, fuel coating manufacturing, solvent manufacturing and using and the like. VOCs discharged in most industrial production processes belong to waste gas with large air volume and low concentration. Direct incineration usually requires a large investment and excessive energy consumption.
The molecular sieve rotating wheel is a device which can concentrate organic waste gas with large air quantity and low concentration into organic waste gas with small air quantity and high concentration by means of adsorption and desorption.
The molecular sieve runner is divided into an adsorption zone, a desorption zone and a cooling zone. Waste gas gets into the adsorption zone and adsorbs the back emission, and the runner reaches desorption district desorption through rotating in succession, and unadsorbed waste gas or fresh air get into the cooling zone and cool down the runner region after will desorbing, and the air through the cooling zone is used as the desorption after heating again, reaches regenerated effect.
The conventional molecular sieve rotating wheel is suitable for treating low-concentration easily-adsorbed substances, can achieve a higher concentration ratio, and obtains excellent economy. For some substances with high concentration and relatively difficult adsorption, such as ethanol and the like, in order to ensure that the exhaust gas after adsorption meets the emission standard, the desorption air quantity and the rotation speed of the molecular sieve rotating wheel need to be increased, and the concentration ratio is generally lower. The concentration after concentration is not high, and the investment, energy consumption and installed power of rear-end processing equipment are overlarge due to the fact that desorption air with large air quantity is heated, and the economic benefit of concentration cannot be shown.
In view of this, the present application is specifically made.
SUMMERY OF THE UTILITY MODEL
The utility model provides a VOCs adsorption concentration purification system, aiming at the working condition of high-concentration and difficult-to-adsorb substances, through designing a waste gas pipeline and an air return pipeline of a cooling area, on one hand, the cooling area is continuously cooled, and on the other hand, the concentrated waste gas is continuously re-concentrated; meanwhile, a deep cooling air pipeline and a deep cooling area are designed, so that the adsorption effect and the purification efficiency are further ensured, and the investment specification, the installed power and the operation energy consumption of rear-end incineration or catalytic equipment are reduced.
The utility model discloses specific technical scheme as follows:
the utility model provides a VOCs adsorbs concentrated clean system, including the absorption runner that contains adsorption zone, desorption district and cooling space, with waste gas inlet line and the exhaust outlet pipeline that the adsorption zone of absorption runner is connected, with desorption gas inlet line and desorption gas outlet pipeline that the desorption district of absorption runner is connected still include by the cooling space waste gas pipeline that waste gas inlet line draws, cooling space waste gas pipeline passes the cooling space.
The desorption gas outlet pipeline is divided into two paths, one path is a concentrated waste gas outlet pipeline, and the other path is a return air pipeline; and the cooling area waste gas pipeline penetrates through the cooling area and is communicated with the air return pipeline through a three-way diversion mixer.
Further, the system also comprises a desorption heating device, wherein the desorption heating device comprises an inlet and an outlet; the cooling area waste gas pipeline is communicated with the air return pipeline and then connected to an inlet of the desorption heating device, and an outlet of the desorption heating device is communicated with the desorption gas inlet pipeline.
Preferably, the air return pipeline is provided with an air return proportion regulating valve.
The applicant proves through a large number of experiments that in the desorption process of the adsorption rotating wheel, the desorption effect of the VOCs waste gas with the concentration below 25% LEL and the desorption effect of the fresh air are not obviously different. Therefore, the utility model discloses by the cooling zone waste gas pipeline that waste gas inlet pipeline draws, cooling zone waste gas pipeline passes the cooling zone realizes the effect that subtracts wind and thicken through containing VOCs circulated air desorption. Although the air volume entering the rear-end oxidation equipment is greatly reduced after air reduction and concentration increase, the air intake volume, namely the cooling air volume, of the whole circulating air system is also reduced, partial adsorption rotating wheels are overheated due to insufficient cooling air volume, the adsorption effect is seriously reduced, and the outlet is easy to exceed the standard.
Therefore, the adsorption rotating wheel of the utility model further comprises a deep cooling area, and the deep cooling area is arranged between the adsorption area and the cooling area. Through increasing degree of depth cooling zone makes the absorption runner cool off completely, guarantees that absorption efficiency and export are up to standard.
Preferably, the angle of the desorption zone of the adsorption rotating wheel is 30-45 degrees, the angle of the cooling zone is 20-45 degrees, the angle of the deep cooling zone is 5-25 degrees, and the angle of the adsorption zone is 260-300 degrees.
Furthermore, the system also comprises a deep cooling air pipeline which penetrates through the deep cooling area and then is connected into the waste gas outlet pipeline and/or the waste gas inlet pipeline.
And a deep cooling air adjusting valve is also arranged on the pipeline before the deep cooling air pipeline enters the deep cooling area.
Under each district angle distribution of above-mentioned absorption runner, the deep cooling gas of cooperation degree of depth cooling air governing valve control and the partial concentrated waste gas of return air proportion governing valve control down, effectively solved because the return air pipeline has supplemented some desorption gas entry waste gas amount of wind, the amount of wind that leads to cooling space waste gas pipeline is less, can not cool off the absorption runner completely, lead to its part overheated, influence the problem of adsorption effect and purification efficiency, can not influence the cooling space waste gas pipeline simultaneously and continuously subtract the concentrated effect of wind.
The utility model provides a VOCs adsorbs concentrated purification method based on foretell system, waste gas gets into the adsorption zone of adsorption wheel is by after adsorbing the evacuation of exhaust outlet pipeline, and the desorption gas that gets into through the heating changes concentrated waste gas into after the desorption district of adsorption wheel carries out the desorption, follows the waste gas inlet pipeline divides cooling zone waste gas warp of the same way the cooling zone waste gas pipeline gets into the cooling zone is in order to reduce the temperature of adsorption wheel, makes simultaneously the cooling zone waste gas temperature risees.
Further, the cooling zone waste gas and a part of concentrated waste gas mix the back and get into the desorption district, heat the desorption district is with desorption waste gas, concentrated waste gas obtains further concentration.
Furthermore, the utility model discloses also can introduce the degree of depth cooling wind extremely the form in degree of depth cooling district makes the absorption runner cooling is to the normal atmospheric temperature.
Preferably, the temperature of the waste gas in the cooling zone is 120-200 ℃, and the temperature of the waste gas at the desorption gas inlet is 180-300 ℃.
Preferably, the air volume ratio of the concentrated waste gas outlet to the concentrated waste gas outlet is 1/4-3/4.
Preferably, the ratio of the waste gas entering the adsorption rotating wheel from the waste gas inlet pipeline to the concentrated waste gas at the concentrated waste gas outlet is 8: 1-70: 1.
The utility model discloses a VOCs adsorbs concentration clean system, to the operating mode of high concentration and difficult adsorbate, through designing cooling zone waste gas pipeline and return air pipeline, on the one hand continuously cools off the cooling zone, on the other hand continuously carries out reconcentration to concentrated waste gas; meanwhile, a deep cooling air pipeline and a deep cooling area are designed, and the adsorption effect and the purification efficiency are further ensured. The system and the method can realize unprecedented concentration multiple of the adsorption rotating wheel, can reach 70 times of concentration proportion in the continuous operation process, and reduce the investment specification, installed power and operation energy consumption of rear-end incineration or catalysis equipment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention.
Fig. 1 is a schematic structural diagram of a system for adsorbing, concentrating and purifying VOCs in embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a VOCs adsorption concentration purification system of embodiment 2 of the present invention.
Description of reference numerals:
1. an exhaust gas inlet line; 2. an exhaust gas outlet line; 3. a cooling zone exhaust gas line; 4. a desorption gas inlet pipeline; 5. a desorption gas outlet pipeline; 6. a concentrated waste gas outlet pipeline; 7. a return air line; 8. a deep cooling air inlet pipeline; 9. an outlet pipeline of deep cooling air; 10. an adsorption rotating wheel; 11. an adsorption fan; 12. a desorption fan; 13. a desorption heating device; 14. a three-way diversion mixer; 15. a return air proportion regulating valve; 16. a fresh air filter; 17. a deep cooling air regulating valve; 18. a second deep cooling air inlet pipeline; 19. a second deep cooling air outlet pipeline; 20. a second deep cooling air adjusting valve; 21. an adsorption zone; 22. a desorption zone; 23. a cooling zone; 24. a deep cooling zone.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to specific examples, but those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
The utility model provides a VOCs adsorbs concentrated clean system, as shown in figure 1, including the absorption runner 10 that contains adsorption zone 21, desorption district 22 and cooling zone 23, the waste gas inlet pipeline 1 and the waste gas outlet pipeline 2 of being connected with the adsorption zone 21 of absorption runner 10, the desorption gas inlet pipeline 4 and the desorption gas outlet pipeline 5 of being connected with the desorption district 22 of absorption runner 10, still include the cooling zone waste gas pipeline 3 of being drawn forth by waste gas inlet pipeline 1, cooling zone waste gas pipeline 3 passes cooling zone 23.
The desorption gas outlet pipeline 5 is divided into two paths, one path is a concentrated waste gas outlet pipeline 6, and the other path is a return air pipeline 7; the cooling zone exhaust gas line 3 passes through the cooling zone 23 and then communicates with the return line 7 via a three-way diversion mixer 14.
Further, the system also comprises a desorption heating device 13, wherein the desorption heating device 13 comprises an inlet and an outlet; the cooling zone waste gas pipeline 3 is communicated with the return air pipeline 7 and then connected with an inlet of the desorption heating device 13, and an outlet of the desorption heating device 13 is communicated with the desorption gas inlet pipeline 4.
The return air pipeline 7 is provided with a return air proportion regulating valve 15.
The sorption rotor 10 further comprises a deep cooling zone 24, the deep cooling zone 24 being disposed between the sorption zone 21 and the cooling zone 23.
In this embodiment, the angle of the desorption zone 22 of the adsorption rotor is 35 °, the angle of the cooling zone 23 is 30 °, the angle of the deep cooling zone 24 is 15 °, and the angle of the adsorption zone 21 is 280 °.
Further, the system also comprises a deep cooling air pipeline which penetrates through the deep cooling area 24 and then is connected into the waste gas outlet pipeline 2. The deep cooling air duct comprises a deep cooling air inlet duct 8 located before the deep cooling zone 24 and a deep cooling air outlet duct 9 located after the deep cooling zone 24.
The deep cooling air inlet pipeline 8 is also provided with a deep cooling air adjusting valve 17, in the embodiment, the deep cooling air inlet pipeline 8 is connected with a fresh air device, and a fresh air filter 16 is arranged on the deep cooling air inlet pipeline 8 and at the upstream of the deep cooling air adjusting valve 17.
Under each district angle distribution of absorption runner 10, the gaseous and partial concentrated waste gas under the control of return air proportion governing valve 15 of cryrogenic gas and the cooperation degree of depth cooling air governing valve 17 control, effectively solved because return air pipeline 7 has supplemented some desorption gas entry waste gas amount of wind, the amount of wind that leads to cooling zone waste gas pipeline 3 is less, can not cool off absorption runner 10 completely, lead to its part overheated, influence the problem of adsorption effect and purification efficiency, can not influence cooling zone waste gas pipeline 3 simultaneously and continue the effect of subtract wind and increase concentration.
A VOCs adsorbs concentration purification method based on the system, waste gas enters an adsorption area 21 of an adsorption rotating wheel 10, is exhausted through a waste gas outlet pipeline 2 after being adsorbed, heated desorption gas enters a desorption area 22 of the adsorption rotating wheel 10 for desorption and then is converted into concentrated waste gas, one path of cooling area waste gas is separated from a waste gas inlet pipeline 1, and the cooling area waste gas enters a cooling area 23 through a cooling area waste gas pipeline 3 so as to reduce the temperature of the adsorption rotating wheel 10, and meanwhile, the temperature of the cooling area waste gas is increased.
Further, the cooling zone exhaust gas and a part of the concentrated exhaust gas are mixed and then enter the desorption zone 22, the desorption zone 22 is heated to desorb the exhaust gas, and the concentrated exhaust gas is further concentrated.
Furthermore, the present embodiment introduces deep cooling wind into the deep cooling zone 24 to cool the adsorption rotor 10 to normal temperature. In a preferred embodiment, a fresh air system may be used to supply the deep cooling air.
The specific process is that the waste gas enters from the adsorption area 21 of the adsorption rotating wheel 10, and after adsorption purification, the waste gas is changed into the purified gas reaching the standard and discharged from the outlet of the rotating wheel by the power provided by the adsorption fan 11 at the outlet of the adsorption rotating wheel 10. A part of the exhaust gas is extracted from the exhaust gas inlet pipeline 1 and passes through the cooling area 23 of the adsorption rotor 10, so that the adsorption rotor 10 is reduced by a certain temperature, and the part of the exhaust gas is increased by a certain temperature to become the outlet exhaust gas of the cooling area 23. The exhaust gas at the outlet of the cooling zone and part of the concentrated exhaust gas in the return pipeline 7 are mixed and guided in the three-way guide mixer 14, and then enter the desorption heating device 13 together to be heated and become desorption inlet exhaust gas. Desorption entry waste gas is through adsorbing runner 10 desorption district 22 after, and waste gas temperature reduces, will adsorb runner 10 desorption district 22 heating simultaneously and make the VOCs waste gas desorption of adsorbing above-mentioned, gets into desorption gas outlet pipe way 5. The concentrated waste gas at the desorption outlet is powered by a desorption fan 12, part of the concentrated waste gas enters the return air pipeline 7, and part of the concentrated waste gas enters the incineration or catalytic furnace through the outlet of the concentrated waste gas outlet pipeline. The air quantity ratio entering the return air pipeline 7 is controlled by a return air ratio adjusting valve 15.
The rotation direction of the adsorption rotor 10 is from the adsorption zone 21 to the desorption zone 22, then to the cooling zone 23, then to the deep cooling zone 24, and finally back to the adsorption zone 21. Because the return air pipeline 7 supplements the air volume of a part of desorption inlet waste gas, the air volume of the cooling air outlet waste gas of the cooling area waste gas pipeline 3 is smaller, the adsorption rotating wheel 10 cannot be completely cooled, the adsorption rotating wheel 10 is partially overheated, the adsorption effect and the purification efficiency are affected, and a deep cooling area is needed. Clean ambient air through new trend filter 16 gets into degree of depth cooling air inlet pipeline 8, after absorption runner 10 degree of depth cooling zone 24, makes absorption runner 10 wholly fall to the normal atmospheric temperature, makes clean gas rise after certain temperature simultaneously and gets into degree of depth cooling air outlet pipeline 9 and the discharge after converging absorption fan 11, and the proportion of this part degree of depth cooling air is controlled by degree of depth cooling air governing valve 17.
In this embodiment, according to different waste gas types and operating mode, cooling zone exhaust gas temperature is 120 ~ 200 ℃, and desorption gas entry exhaust gas temperature is 180 ~ 300 ℃.
The air volume of the concentrated waste gas outlet accounts for 1/4-3/4 of the air volume of the concentrated waste gas at the desorption gas outlet.
The ratio of the waste gas entering the adsorption rotating wheel 10 from the waste gas inlet pipeline 1 to the concentrated waste gas at the concentrated waste gas outlet is 8: 1-70: 1.
In one embodiment of this example, the exhaust gas component is ethanol at a concentration of 1400mg/m3To meet the emission concentration of < 50mg/m3After the rotating wheel with the deep cooling area and the air reduction and concentration increasing function is used, the concentration multiple can be increased to 9-10 times from 4-5 times, the air quantity is changed to 50% of the original air quantity, the self-balancing concentration of the catalytic oxidation furnace is achieved, and the whole system can only consume the power consumption of a fan without additional heating energy consumption.
In another embodiment of this example, the off-gas component was ethyl acetate at a concentration of 80mg/m3Concentrating to 2000mg/m at maximum by conventional adsorption rotary wheel3After concentration is still low, the catalytic oxidation furnace still needs to supplement high heat, and the concentration multiple can be increased to 60 times by using the rotating wheel with the deep cooling area and the wind reduction and concentration increasing functions, namely the concentration can reach 4800mg/m3The air volume becomes 41% of the original volume.
Example 2
The utility model provides a VOCs adsorbs concentrated clean system, and is different from embodiment 1 in that, degree of depth cooling air pipe way is provided by original system itself, as shown in fig. 2, degree of depth cooling air pipe way passes degree of depth cooling district 24, and degree of depth cooling air pipe way includes second degree of depth cooling air inlet pipeline 18 that draws forth from exhaust gas outlet pipeline 2 and inserts exhaust gas inlet pipeline 1's second degree of depth cooling air outlet pipeline 19. A second deep cooling air adjusting valve 20 is arranged on the second deep cooling air inlet pipeline 18.
A second deep cooling air inlet pipeline 18 is led out from the waste gas outlet pipeline 2, so that deep cooling air enters a deep cooling area 24 of the adsorption runner 10 to cool the deep cooling air, and then enters the waste gas inlet pipeline 1 for circulation.
The design has a certain influence on the adsorption effect of the adsorption rotating wheel 10 especially when the relative humidity of the waste gas at the inlet of the adsorption rotating wheel 10 is high, and a strand of hot air is required to be additionally introduced conventionally or the temperature of the waste gas is increased by heating and the like to reduce the relative humidity. Therefore, the present embodiment can cool the adsorption rotor 10 by the rotor outlet purified gas with positive pressure at the rear end of the adsorption fan 11 through the second deep cooling air inlet pipeline 18, and then the second deep cooling air outlet pipeline 19 is drawn back into the waste gas inlet pipeline 1, so that the purposes of warming and dehumidifying the inlet waste gas and cooling the adsorption rotor 10 are achieved.
Example 3
The two deep cooling air pipelines of the embodiment 1 and the embodiment 2 are combined and coexist, and can be applied to some special working conditions.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Moreover, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims above, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
Claims (8)
1. The utility model provides a VOCs adsorbs concentrated clean system, including the absorption runner that contains adsorption zone, desorption district and cooling space, with waste gas inlet line and the exhaust outlet pipeline that the adsorption zone of absorption runner is connected, with desorption gas inlet line and desorption gas outlet pipeline that the desorption district of absorption runner is connected, its characterized in that still includes by the cooling space waste gas pipeline that waste gas inlet pipeline draws, cooling space waste gas pipeline passes the cooling space.
2. The system for adsorbing, concentrating and purifying VOCs according to claim 1, wherein the desorption gas outlet pipeline is divided into two paths, one path is a concentrated waste gas outlet pipeline, and the other path is a return air pipeline; and the cooling area waste gas pipeline penetrates through the cooling area and is communicated with the air return pipeline through a three-way diversion mixer.
3. The system of claim 2 further comprising a desorption heating device comprising an inlet and an outlet; the cooling area waste gas pipeline is communicated with the air return pipeline and then connected to an inlet of the desorption heating device, and an outlet of the desorption heating device is communicated with the desorption gas inlet pipeline.
4. The system of claim 2 or 3, wherein the return air pipeline is provided with a return air proportion adjusting valve.
5. The system of claim 4, wherein the sorption wheel further comprises a quench zone, the quench zone being disposed between the sorption zone and the cooling zone.
6. The system of claim 5, further comprising a deep cooling air line, wherein the deep cooling air line passes through the deep cooling zone and then is connected to the exhaust gas outlet line and/or the exhaust gas inlet line.
7. The system of claim 6, wherein a deep cooling air adjustment valve is further disposed on the deep cooling air pipeline before the deep cooling air pipeline enters the deep cooling zone.
8. The VOCs adsorption, concentration and purification system of claim 5, wherein the angle of the desorption zone of the adsorption rotating wheel is 30-45 degrees, the angle of the cooling zone is 20-45 degrees, the angle of the deep cooling zone is 5-25 degrees, and the angle of the adsorption zone is 260-300 degrees.
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| CN112546811A (en) * | 2020-12-29 | 2021-03-26 | 青岛华世洁环保科技有限公司 | VOCs adsorption concentration purification system and VOCs adsorption concentration purification method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112546811A (en) * | 2020-12-29 | 2021-03-26 | 青岛华世洁环保科技有限公司 | VOCs adsorption concentration purification system and VOCs adsorption concentration purification method |
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Address after: No. 16 Liupanshan Road, Huangdao District, Qingdao City, Shandong Province, China 266510 Patentee after: Qingdao Huashijie New Material Technology Group Co.,Ltd. Country or region after: China Address before: No. 16 Liupanshan Road, Huangdao District, Qingdao City, Shandong Province, China 266510 Patentee before: QINGDAO HUASHIJIE ENVIRONMENT PROTECTION TECHNOLOGY Co.,Ltd. Country or region before: China |