CN209735266U - Unitized reaction system for voc adsorption - Google Patents

Unitized reaction system for voc adsorption Download PDF

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Publication number
CN209735266U
CN209735266U CN201920110561.5U CN201920110561U CN209735266U CN 209735266 U CN209735266 U CN 209735266U CN 201920110561 U CN201920110561 U CN 201920110561U CN 209735266 U CN209735266 U CN 209735266U
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adsorption
steam
unitized
voc
adsorption unit
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CN201920110561.5U
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龙陈涛
刘迎伟
曾思泉
钟润洪
黄荣贵
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Guangzhou Environmental Protection Equipment Factory Co Ltd
Guangdong Longben Environmental Design Institute Co Ltd
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Guangzhou Environmental Protection Equipment Factory Co Ltd
Guangdong Longben Environmental Design Institute Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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Abstract

The utility model discloses a unitized reaction system for voc is adsorbed, including steam desorption system, adsorption system and condensation collecting system, steam desorption system includes steam generator, adsorption system includes base down, go up the top cap, establish ties a plurality of absorption units between base and last top cap down, waste gas entry and steam outlet have been seted up to the base down, it is equipped with tail gas outlet and steam inlet to go up the top cap to open, condensation collecting system includes spiral plate condenser and condensation collecting tank, steam generator links to each other through the steam inlet of main steam pipeline with last top cap, the steam outlet of base links to each other with the condensation collecting tank through the spiral plate condenser down. The utility model discloses a unitized adsorption system, simple to operate, adsorption efficiency are good, convenient operation, running cost hang down.

Description

Unitized reaction system for voc adsorption
Technical Field
The utility model relates to a volatile organic compound's processing field, concretely relates to a unitized reaction system for voc is adsorbed.
background
Volatile Organic Compounds (VOCs) are often discharged in the production of petroleum processing, chemical synthesis, pharmacy, paint manufacturing, paint spraying, printing, synthetic board, coating, electronic product cleaning and other industries, and the VOCs are various and mainly comprise hydrocarbons, alcohols, ethers, aldehydes, phenols, lipids, fatty acids, amines, organic halogen derivatives and the like, and have the characteristics of wide pollution range, toxicity, malodor and large emission.
the method for treating the VOC waste gas is selected according to the specific conditions such as the property, the treatment capacity, the local environmental sanitation requirement, the economic condition and the like of the gas. Common methods for treating VOC waste gas include: combustion, adsorption, plasma, and photolysis. The combustion method is to oxidize harmful combustible components in the waste gas into CO2 and H2O by combustion, and mainly comprises the following steps: a burner, a combustion chamber. The method has high removal rate, simple equipment, high energy consumption and high investment and operation cost. The adsorption method is to utilize porous materials to carry out adsorption treatment on the VOC-containing waste gas, thereby achieving the purpose of eliminating harmful substances; the main device comprises a pretreatment unit, an adsorption unit, a cooling unit, a control unit, a safety device unit and a regeneration device; the method has the advantages of thorough waste gas purification, simple adsorption equipment and high treatment efficiency, but the treatment equipment is huge and has higher requirements on the adsorbent. The plasma method is characterized in that a large amount of high-energy electrons are generated through a high-voltage discharge mode, so that chemical bonds in VOC are destroyed, and CO2 and H2O are finally generated; the main device is a plasma reactor; the method has simple equipment and device, but has high energy consumption and low degradation rate, and generates a large amount of intermediate pollutants. The photo-decomposition method is to decompose organic substances by irradiation with light of a certain wavelength or by utilizing the photocatalytic properties of certain catalysts; due to the limitation of materials, most of high-energy photons are absorbed by the lamp tube materials, and the high-energy photons penetrating through the glass are limited, so that the energy efficiency utilization rate is low, the removal efficiency is general, and a large amount of intermediate pollutants are generated.
SUMMERY OF THE UTILITY MODEL
The utility model aims at a unitized reaction system for VOC is absorbent to the active carbon regeneration ability that solves the present VOC adsorption equipment and adopt is poor, and zeolite molecular sieve adsorption capacity is little, and equipment production is complicated, technical problem such as device transportation, installation are inconvenient.
In order to achieve the above purpose, the technical scheme of the utility model is that:
A unitized reaction system for voc adsorption comprises a steam desorption system, an adsorption system and a condensation collection system, wherein the steam desorption system comprises a steam generator, the adsorption system comprises a lower base, an upper top cover and a plurality of adsorption units connected in series between the lower base and the upper top cover, the lower base is provided with a waste gas inlet and a steam outlet, the upper top cover is provided with a tail gas outlet and a steam inlet, the condensation collection system comprises a spiral plate condenser and a condensation collection tank, the steam generator is connected with the steam inlet of the upper top cover through a main steam pipeline, the steam outlet of the lower base is connected with the condensation collection tank through the spiral plate condenser, the adsorption units comprise styrene polymer adsorption fillers, an adsorption unit inner frame, an adsorption unit outer cover plate and heat preservation cotton, the adsorption unit inner frame is of a box body structure with an upper opening and a lower opening, the styrene polymer adsorption fillers are arranged in the adsorption unit inner frame, the outer cover plate of the adsorption unit is arranged on the outer wall of the inner frame of the adsorption unit so as to clamp the heat insulation cotton between the inner frame of the adsorption unit and the outer cover plate of the adsorption unit.
As an improvement of the utility model: the lower base is internally provided with an air distribution plate which is positioned above the waste gas inlet.
As an improvement of the utility model: main steam conduit go up along the flow direction and be equipped with steam pressure gauge, ball valve, pressure regulating valve, flowmeter, ball valve and steam pressure gauge in proper order, and the distance of pressure regulating valve and flowmeter is no less than 500 mm.
As an improvement of the utility model: and a branch with a ball valve is also connected in parallel between the two steam pressure gauges on the main steam pipeline.
As an improvement of the utility model: the condensation collection system also comprises two spiral tube heat exchangers which are connected in parallel between the spiral plate condenser and the condensation collection tank.
As an improvement of the utility model: and the air outlet of the condensation collection tank is connected to the waste gas inlet of the lower base.
As an improvement of the utility model: the air distribution plate and the inner frame of the adsorption unit are made of stainless steel.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. The adsorption system adopts a unitized design, so that the transportation and equipment installation are more convenient and more cost-effective, and the adsorption units can be more conveniently increased or reduced when the working condition of the equipment is changed.
2. The outer cover plate of the adsorption unit adopts a split design, and is more convenient and mass production in the production process, so that the production cost is greatly reduced
3. the adsorption filler adopts styrene polymer, and the adsorption performance and the desorption performance are greatly improved.
Drawings
fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of an adsorption unit of the present invention, wherein styrene polymer adsorbent packing is shown;
Description of reference numerals: 1-a lower base; 2-an adsorption unit; 3, mounting a top cover; 4-an exhaust gas inlet; 5-a steam outlet; 6-air distribution plate; 7-tail gas outlet; 8-a steam inlet; 9-an explosion-proof fan; 10-a steam generator; 11-a steam pressure gauge; 12-a ball valve; 13-a pressure regulating valve; 14-a flow meter; 15-spiral plate condenser; 16-a spiral tube heat exchanger; 17-a condensation collection tank; 18-a pump; 21-an adsorption unit inner frame; 22-an adsorption unit outer cover plate; 23-heat preservation cotton; 24-support plate.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 and 2, a unitized reaction system for voc adsorption includes a vapor desorption system, an adsorption system, and a condensate collection system.
The adsorption system comprises a lower base 1, an adsorption unit 2 and an upper top cover 3. The adsorption units 2 are multiple and are sequentially connected in series between the lower base 1 and the upper top cover 3, the lower base 1 is provided with a waste gas inlet 4 and a steam outlet 5, the upper top cover 3 is provided with a tail gas outlet 7 and a steam inlet 8, and the lower base 1 is provided with a wind distribution plate 6 above the waste gas inlet 4. The tail gas outlet 7 is connected with an explosion-proof fan 9, the pretreated VOC waste gas is pumped into the adsorption system from the waste gas inlet 4 of the lower base, and flows through the air distribution plate 6, so that the VOC waste gas is more uniformly distributed in the adsorption system, then enters the adsorption unit filled with styrene polymer adsorption filler to adsorb VOC, and finally is discharged through the tail gas outlet 7.
The adsorption unit 2 comprises styrene polymer adsorption filler, an adsorption unit inner frame 21, an adsorption unit outer cover plate 22 and heat insulation cotton 23. The adsorption unit inner frame 21 is a box structure with an upper opening and a lower opening, the embodiment is a rectangular structure, styrene polymer adsorption filler is arranged in the adsorption unit inner frame 21, the styrene polymer filler can be granular, honeycomb or hollow column, a plurality of support plates 24 extending inwards are arranged on the inner wall of the adsorption unit inner frame 21, when the adsorption unit inner frame adopts the honeycomb or hollow column shape, the adsorption unit inner frame can be directly placed on the support plates 24, and if the adsorption unit inner frame is granular, a stainless steel screen is required to be placed on the support plates 24. The heat preservation cotton 23 is arranged between the adsorption unit inner frame 21 and the adsorption unit outer cover plate 22 to prevent heat dissipation of the adsorption unit 2. The outer cover plate 22 of the adsorption unit adopts a split type design and is fixed on the outer wall of the inner frame 21 of the adsorption unit through bolts, and the screw holes of the outer cover plate 22 of the adsorption unit are sealed by plastic screw hole sealing covers to form an independent adsorption unit.
In order to improve the corrosion resistance of the adsorption system, the air distribution plate 6 and the adsorption unit inner frame 21 are made of stainless steel. In addition, the adsorption system can be arranged in a plurality of ways according to actual working conditions, the adsorption units 2 are connected in parallel through pipelines and valves, and the sizes of the adsorption unit inner frame 21 and the adsorption unit outer cover plate 22 are also determined according to the actual working conditions.
The steam desorption system comprises a steam generator 10, a main steam pipeline which is communicated with the steam generator 10 and the steam outlet 5, and a branch pipeline which is connected in parallel with the main steam pipeline. The main steam pipeline is provided with a steam pressure gauge 11, a ball valve 12, a pressure regulating valve 13, a flow meter 14, a ball valve 12 and the steam pressure gauge 11 in sequence along the flowing direction, the distance between the pressure regulating valve 13 and the flow meter 14 is not less than 500mm, and the pressure of the pressure regulating ball valve 13 is set according to the boiling point of VOC. A ball valve 12 is arranged on the branch, and two ends of the ball valve are connected between the two steam pressure gauges 11 in parallel.
The condensation collecting system comprises a spiral plate condenser 15, two spiral pipe heat exchangers 16, a condensation collecting tank 17, a corresponding connecting pipeline and a valve, a hot end inlet of the spiral plate condenser 15 is connected with a steam outlet of the adsorption system, a hot end outlet of the spiral plate condenser 15 is divided into two paths, the two paths are respectively connected with the condensation collecting tank 17 after passing through the spiral pipe heat exchanger 16, liquid in the condensation collecting tank 17 is discharged through a pump 18, and gas is connected to a waste gas inlet 4 of the lower base 1 through a pipeline to be treated again.
The working process of the utility model is as follows:
Open explosion-proof fan 9, the VOC waste gas that will pretreat is from the waste gas entry 4 suction adsorption system of lower base 1, and the air distribution plate 6 of flowing through makes VOC waste gas more even distribution in adsorption system, then gets into the adsorption unit that is filled with styrene polymer adsorption filler and adsorbs VOC, finally discharges at the tail gas outlet 7 of upper cover 3. And when the filler is saturated in adsorption, closing the waste gas inlet 4 and the tail gas outlet 7, opening all ball valves 12 on the main steam pipeline and inlet butterfly valves of the condensation collection system, and starting the steam generator 10. When the pressure of the steam reaches the set pressure of the pressure regulating valve 13, pressurized steam enters from the steam inlet 8 of the upper top cover 3 of the adsorption system, so that styrene polymer filler in the adsorption unit is subjected to pressurized desorption, and the desorbed steam with VOC flows into the condensation collection system from the steam outlet 5 of the lower base 1 of the adsorption system. The VOC laden vapor entering the condensing collection system first passes through a first stage condensing spiral plate condenser 15 to cause a phase change in a portion of the VOC laden vapor. The steam with the phase change flows into the spiral tube heat exchanger 16 (the spiral tube heat exchanger 16 at the lower part in the figure) of the second-stage condensation for cooling, and finally flows into the condensation collection tank 17, while the steam without the phase change flows into the spiral tube heat exchanger 16 connected in parallel at the upper part for phase change again, and finally flows into the condensation collection tank 17.
The following examples illustrate the effect of the present invention on VOC treatment:
Treatment of ethyl acetate off-gas at a concentration of 460mg/m 3:
And opening an explosion-proof fan 9 of the tail gas outlet 7, enabling the flow rate of the pretreated ethyl acetate waste gas to be 1000m3/h, enabling the height of each adsorption unit to be 20cm, enabling the area to be 250cm2, using 4 adsorption units, and enabling the air speed of the gas passing through the cross section of each adsorption unit to be 2 m/s. The operation is continuously carried out for 4 hours, the concentration of the ethyl acetate at the gas outlet after purification is 20mg/m3, the removal rate of the adsorbent to the ethyl acetate in the waste gas reaches 95%, and the adsorption quantity is 3.52 kg.
The valves of the waste gas inlet 4 and the tail gas outlet 7 are closed, all ball valves of the main steam pipeline and the inlet butterfly valve of the condensation collection system are opened, the pressure of the pressure regulating valve 13 is set to be 0.3mpa, and the steam generator 10 is started. When the steam pressure reaches 0.3mpa, the pressure regulating valve 13 is opened, and the steam with pressure is introduced into the adsorption unit for desorption, and the concentration of the steam at the inlet of the condensation collection system is 1840mg/m 3. After one hour, the concentration at the inlet of the condensing collection system was 0mg/m3 and desorption was complete. During the whole desorption process, 3150ml of ethyl acetate was collected in the condensate collection tank 17.
the above detailed description is specific to possible embodiments of the present invention, and the embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention should be included within the scope of the present invention.

Claims (7)

1. A unitized reaction system for voc adsorption characterized by: comprises a steam desorption system, an adsorption system and a condensation collection system, wherein the steam desorption system comprises a steam generator, the adsorption system comprises a lower base, an upper top cover and a plurality of adsorption units connected in series between the lower base and the upper top cover, the lower base is provided with a waste gas inlet and a steam outlet, the upper top cover is provided with a tail gas outlet and a steam inlet, the condensation collection system comprises a spiral plate condenser and a condensation collection tank, the steam generator is connected with the steam inlet of the upper top cover through a main steam pipeline, the steam outlet of the lower base is connected with the condensation collection tank through the spiral plate condenser, the adsorption units comprise styrene polymer adsorption filler, an adsorption unit inner frame, an adsorption unit outer cover plate and heat insulation cotton, the adsorption unit inner frame is of a box body structure with an upper opening and a lower opening, the styrene polymer adsorption filler is arranged in the adsorption unit inner frame, the adsorption unit outer cover plate is arranged, so as to clamp the heat preservation cotton between the inner frame of the adsorption unit and the outer cover plate of the adsorption unit.
2. The unitized reaction system for voc adsorption of claim 1, wherein: the lower base is internally provided with an air distribution plate which is positioned above the waste gas inlet.
3. The unitized reaction system for voc adsorption of claim 1, wherein: main steam conduit go up along the flow direction and be equipped with steam pressure gauge, ball valve, pressure regulating valve, flowmeter, ball valve and steam pressure gauge in proper order, and the distance of pressure regulating valve and flowmeter is no less than 500 mm.
4. A unitized reaction system for voc adsorption according to claim 3, wherein: and a branch with a ball valve is also connected in parallel between the two steam pressure gauges on the main steam pipeline.
5. The unitized reaction system for voc adsorption of claim 1, wherein: the condensation collection system also comprises two spiral tube heat exchangers which are connected in parallel between the spiral plate condenser and the condensation collection tank.
6. the unitized reaction system for voc adsorption of claim 1, wherein: and the air outlet of the condensation collection tank is connected to the waste gas inlet of the lower base.
7. The unitized reaction system for voc adsorption of claim 2, wherein: the air distribution plate and the inner frame of the adsorption unit are made of stainless steel.
CN201920110561.5U 2019-01-21 2019-01-21 Unitized reaction system for voc adsorption Active CN209735266U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920110561.5U CN209735266U (en) 2019-01-21 2019-01-21 Unitized reaction system for voc adsorption

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920110561.5U CN209735266U (en) 2019-01-21 2019-01-21 Unitized reaction system for voc adsorption

Publications (1)

Publication Number Publication Date
CN209735266U true CN209735266U (en) 2019-12-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113400510A (en) * 2021-06-24 2021-09-17 中国石油化工股份有限公司 Optimized polypropylene underwater pelletizing system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113400510A (en) * 2021-06-24 2021-09-17 中国石油化工股份有限公司 Optimized polypropylene underwater pelletizing system
CN113400510B (en) * 2021-06-24 2022-08-02 中国石油化工股份有限公司 Optimized polypropylene underwater pelletizing system

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