CN211706335U - VOC normal temperature condensation processing system utilizing active carbon static activity - Google Patents

Abstract

The utility model discloses a VOC room temperature condensation treatment system and method utilizing the static activity of activated carbon, and relates to the technical field of industrial emission VOCs treatment. The system comprises a VOCs pretreatment system, a desorption condensation system, an auxiliary adsorption bed C, an adsorption bed A and an adsorption Bed B; Adsorption beds A and B are connected to the adsorption fan through the adsorption inlet valve; the adsorption fan is connected to the VOCs pretreatment system; Ab and Ba are serially closed and connected; both ends of adsorption bed A, adsorption bed B and auxiliary adsorption bed C are respectively connected to both ends of the desorption condensation system through desorption condensation valves. The treatment method using the system of the utility model makes full use of the static activity of the activated carbon, reduces the cost, prolongs the service life, and the recovered organic solvent has high purity and high recovery efficiency; the "2+1" mode makes the control strategy simpler and the operation more reliable.

Description

A VOC room temperature condensation treatment system using activated carbon static activity

technical field

The utility model relates to the technical field of industrial emission VOCs treatment, in particular to a VOC room temperature condensation treatment system utilizing the static activity of activated carbon.

Background technique

Volatile organic compounds (VOCs) in the atmosphere cause serious damage to plant and animal life and affect human health such as eye irritation, respiratory problems, cancer and the like. VOCs used as organic solvents in industries such as spraying and furniture can account for 35-40% of atmospheric VOCs emission sources. In the above industries, common treatment methods for VOCs include: adsorption, absorption, condensation and other recovery methods and direct combustion, catalytic oxidation, biological treatment, low temperature plasma and photocatalysis and other destruction methods; in practical applications, two or more of the above methods are generally combined. three. Among them, the VOCs treatment method of activated carbon adsorption concentration combined with condensation recovery is more convenient and simple, and has high economic benefits, which is an ideal treatment method.

Luo Fukun et al. proposed a process of activated carbon adsorption and N2 desorption to recover and treat organic waste gas. After adsorption, N2 vacuum 4-10KPa cycle heating and desorption is used, and then it is condensed by a two-stage condensing device, and the residual VOCs are purged with fresh air. into another adsorber for adsorption. The patent can effectively desorb and condense VOCs gas, but the final use of fresh air purging still faces safety risks and affects the service life of activated carbon. He Yani et al. proposed an activated carbon adsorption hot nitrogen desorption condensation recovery system. After desorption of gas, three-stage condensation is used. After desorption, the non-condensable gas in the pipeline enters the auxiliary activated carbon adsorber for adsorption. There is still three-stage condensation in this patent. High energy consumption, equipment thermal stress and high air tightness requirements.

I have also proposed a VOCs treatment system and its treatment method for assisted purification by normal temperature condensation, using three identical beds to alternate adsorption purification, desorption condensation, and auxiliary purification to achieve a very small residual amount in the bed after desorption and condensation to ensure normal adsorption. The concentration of VOCs emitted during the cycle meets the standard. This patent realizes the adsorption efficiency at the same time of normal temperature condensation, and reduces the process difficulty, equipment cost and operating energy consumption. However, this patent, like other similar patents, only utilizes the kinetic activity of activated carbon, and has higher requirements on the adsorption and desorption performance of activated carbon. It is required that the adsorption amount during auxiliary adsorption is greater than the sum of the condensation residual amount and the dynamic adsorption amount, otherwise there will be the disadvantage of insufficient transfer and the emission concentration after adsorption and purification will not meet the standard.

At present, the adsorption, concentration, condensation and recovery methods of VOCs generally face the following four problems: deep condensation is required, so the energy consumption of condensation and heating is greatly increased; system equipment, pipes and valves are subjected to large temperature differences, resulting in stress loss and difficult to meet air tightness; condensation; Part of the VOCs still remaining in the latter adsorption bed will cause the next stage of the adsorption efficiency to drop, or the use of fresh air hot purging will face the risk of explosion; only the adsorption kinetic activity of activated carbon is used, and part of the adsorption capacity of activated carbon is wasted.

Utility model content

The purpose of this utility model is to provide a VOC room temperature condensation treatment system utilizing the static activity of activated carbon, so as to solve the problems existing in the above-mentioned prior art, make full use of the adsorption capacity of activated carbon, save the use of activated carbon, and realize the utilization of conventional high-efficiency cold sources at the same time. Even natural cold source liquefaction recovers VOCs, which greatly reduces condensation energy consumption and equipment costs.

For achieving the above object, the utility model provides the following scheme:

The utility model provides a VOC room temperature condensation treatment system utilizing the static activity of activated carbon, comprising a VOCs pretreatment system, a desorption condensation system and an auxiliary adsorption bed C, and two parallel adsorption beds A are arranged on one side of the auxiliary adsorption bed C and adsorption bed B; the adsorption bed A is connected with the adsorption fan through the adsorption inlet valve Aa1, and the adsorption bed B is connected with the adsorption fan through the adsorption inlet valve Ba1; the adsorption fan is connected with the VOCs pretreatment system; the adsorption bed A is connected to the atmosphere through the adsorption gas outlet valve Aa2, and the adsorption bed B is connected to the atmosphere through the adsorption gas outlet valve Ba2; between the adsorption bed A and the adsorption bed B, the series valve Ab and the series valve Ba are connected together. The two ends of the adsorption bed A are connected with the two ends of the desorption condensation system through the desorption condensation valve Ad1 and the desorption condensation valve Ad2 respectively, and the two ends of the adsorption bed B are respectively connected through the desorption condensation valve Bd1 and the desorption condensation valve. Bd2 is connected to both ends of the desorption condensation system, and both ends of the adsorption bed C are connected to both ends of the desorption condensation system through the desorption condensation valve Cd1 and the desorption condensation valve Cd2 respectively.

Optionally, the desorption condensing system includes a gas-air heat exchanger, a normal temperature condensing system, a three-way butterfly valve, a desorption fan, a stop valve and a heater that are serially connected in sequence; the three-way butterfly valve includes I passage, II Passage and passage III, the normal temperature condensing system is connected with the I passage, the desorption fan is connected with the II passage, and the connecting pipeline between the II passage and the desorption fan is connected with the gas-gas heat exchange The first branch connected to the device, the III passage is connected to the gas-gas heat exchanger through the second branch; the auxiliary adsorption bed C is connected to both ends of the stop valve through the valve Cp1 and the valve Cp2; the The desorption condensation valve Ad1, the desorption condensation valve Bd1 and the desorption condensation valve Cd1 are connected to the heater through the first desorption condensation pipeline, and the desorption condensation valve Ad2, the desorption condensation valve Bd2 and the desorption condensation valve Cd2 It is connected with the gas-gas heat exchanger through a second desorption condensation pipeline.

Optionally, it also includes a nitrogen supplement system, the nitrogen supplement system includes a nitrogen source and an on-line oxygen content detector, the nitrogen source is connected to the second desorption condensation pipeline through a nitrogen supplement valve n1, and the first desorption condensation The pipeline is connected with a nitrogen supplementary valve n2, and the nitrogen supplementary valve n2 is connected with the adsorption pipeline at the front end of the VOCs pretreatment system through an online oxygen content detector.

Optionally, a VOCs concentration sensor Av is arranged between the adsorption bed A and the adsorption gas outlet valve Aa2, and a VOCs concentration sensor Bv is arranged between the adsorption bed B and the adsorption gas outlet valve Ba2. A VOCs concentration sensor Cv is arranged between the heat exchanger and the normal temperature condensing system, and a VOCs concentration sensor Dv is arranged between one end of the shut-off valve and the valve Cp2.

Optionally, the normal temperature condensation system includes a VOCs liquid storage tank and a normal temperature condenser, and the normal temperature condenser can use a conventional high-efficiency cold source or a natural cold source.

Optionally, both the adsorption fan and the desorption fan are explosion-proof variable frequency fans.

The utility model also provides a treatment method for the VOC normal temperature condensation treatment system utilizing the static activity of the above-mentioned activated carbon, comprising the following steps:

Step 10. Equipment debugging, close all adsorption inlet valves Aa1, adsorption inlet valves Ba1 and all adsorption outlet valves Aa2, adsorption outlet valves Ba2, open all remaining valves, and then turn on the nitrogen source to remove the gas in the system pipeline and equipment. Replace with nitrogen, when the online oxygen content detector shows that the oxygen content is lower than 5%, close all valves and nitrogen sources;

Step 20. Open the adsorption inlet valve Aa1 and the adsorption outlet valve Aa2, and the organic waste gas is cooled and removed by the pretreatment system and then sent to the adsorption bed A, and discharged into the atmosphere after being purified to the standard;

Step 30. When the displayed value of the VOCs concentration sensor Av behind the adsorption bed A reaches 50% of the emission standard, close the adsorption outlet valve Aa2, open the series valve Ab, the adsorption bed B is connected in series behind the adsorption bed A, and the exhaust gas passes through the adsorption bed A in turn. and adsorption bed B and then discharged into the atmosphere until the VOCs concentration sensor Av shows that the adsorption bed A has reached the saturated adsorption capacity and cannot continue the adsorption, and then the adsorption bed A enters the desorption stage, and the adsorption bed B continues to adsorb;

Step 40. Before the adsorption bed A is desorbed, open the nitrogen supplement valve n1, the nitrogen supplement valve n2 and the nitrogen source, and replace the gas in the adsorption bed A with nitrogen and send it into the adsorption pipeline. When the online oxygen content detector shows that the oxygen content is low At 5%, close the nitrogen supplementary valves n1, n2 and the nitrogen source; then open the desorption condensing valve Ad1, the desorption condensing valve Ad2, the shut-off valve, the desorption fan and the heater in turn, and the three-way butterfly valve is switched to I channel, III three. At the passage, when the displayed value of the VOCs concentration sensor Cv reaches the condensing concentration, the condensing system is turned on until no condensate flows out;

Step 50, close the stop valve, open the valve Cp1 and the valve Cp2, switch the three-way butterfly valve to the I channel and the II channel, and the high-temperature and high-concentration VOCs gas from the adsorption bed A is cooled and sent to the adsorption bed C for adsorption. The low-concentration gas is reheated. At this time, the VOCs in the adsorption bed A can continue to be desorbed until the VOCs concentration sensor Cv shows that no VOCs are desorbed in the adsorption bed A. Then open the stop valve, close the valve Cp1, the valve Cp2 and The heater cools the activated carbon in the adsorption bed A;

Step 60. When the displayed value of the VOCs concentration sensor Bv behind the adsorption bed B reaches 50% of the emission standard, close the adsorption outlet valve Ba2, open the series valve Ba, the adsorption bed A is connected in series behind the adsorption bed B, and the exhaust gas passes through the adsorption bed B in turn. and adsorption bed A and then discharged into the atmosphere until the VOCs concentration sensor Bv shows that the adsorption bed B has reached the saturated adsorption capacity and cannot continue to adsorb, and then the adsorption bed B enters the desorption stage, and the adsorption bed A continues to adsorb;

Step 70: Before the desorption of the adsorption bed B, open the nitrogen supplement valve n1, the nitrogen supplement valve n2 and the nitrogen source, and replace the gas in the adsorption bed B with nitrogen and send it into the adsorption pipeline. When the online oxygen content detector shows that the oxygen content is low At 5%, close the nitrogen supplement valve n1, nitrogen supplement valve n2 and nitrogen source; then open the desorption condensing valve Bd1, the desorption condensing valve Bd2, the stop valve, the desorption fan and the heater in turn, and the three-way butterfly valve is switched to the I channel , III passage, when the VOCs concentration sensor Cv display value reaches the condensing concentration, open the condensing system until no condensate flows out;

Step 80, close the stop valve, open the valve Cp1 and the valve Cp2, switch the three-way butterfly valve to the I channel and the II channel position, and the high temperature and high concentration VOCs gas from the adsorption bed B is cooled and sent to the adsorption bed C for adsorption to become. The low-concentration gas is reheated. At this time, the VOCs in the adsorption bed B can continue to be desorbed until the VOCs concentration sensor Cv shows that no VOCs are desorbed in the adsorption bed B. Then open the stop valve, close the valve Cp1, the valve Cp2 and The heater cools the activated carbon in the adsorption bed B;

Step 90, repeat the above steps 30-80;

Step 100, when the VOCs concentration sensor Dv behind the auxiliary adsorption bed C shows that the adsorption bed C has reached the set transfer limit, open the desorption condensation valve Cd1, the desorption condensation valve Cd2, and the stop valve, and switch the three-way butterfly valve to the I channel, At passage III, turn on the desorption fan and heater. When the displayed value of the VOCs concentration sensor Cv reaches the condensing concentration, turn on the condensing system until no condensate flows out, turn off the heater, and cool down the activated carbon in the adsorption bed C.

The utility model has achieved the following technical effects with respect to the prior art:

The VOCs room temperature condensation treatment system and method using the static activity of activated carbon provided by the utility model, according to the characteristics of the breakthrough curve of activated carbon to VOCs combined with the characteristics of activated carbon adsorption isotherm, adopt the 2+1 mode of operation, wherein "2" represents the same two beds (A\B) Rotational adsorption, responsible for the direct treatment of exhaust gas, its operating conditions include: single bed adsorption, front series adsorption, desorption condensation, purification transfer, rear series adsorption; where "1" represents auxiliary bed (C), The amount of activated carbon filled in the C bed is generally larger than that of the A\B bed, and the C bed is not responsible for the adsorption and purification of waste gas. Its operating conditions include: auxiliary adsorption and desorption condensation. By utilizing the static activity of activated carbon and using normal temperature condensation combined with a strictly matched auxiliary adsorption bed for auxiliary purification, the cost and system energy consumption are reduced, and the VOCs solvent is efficiently recovered. According to the breakthrough curve characteristics of activated carbon to VOCs, when the adsorption bed is about to break through and switch the series working conditions, the activated carbon of the adsorption bed is completely saturated with adsorption, so the cost of activated carbon and the volume of the adsorption bed can be greatly reduced when designing the activated carbon adsorption bed. The use of room temperature condensation avoids deep condensation, reduces energy consumption and process difficulty, reduces the temperature difference of fluids in the system, and reduces the thermal stress requirements of equipment and pipelines, thus making the entire solution economically feasible. Strictly match the amount of activated carbon in the auxiliary adsorption bed, so that the auxiliary adsorption bed can completely adsorb the VOCs remaining in the adsorption bed A or B after condensation, so that the adsorption efficiency of the adsorption bed A and B in the next cycle can still be maintained at a high level, and After the adsorption of the auxiliary adsorption bed is completed, it can be further desorbed and the desorbed VOCs can be condensed and recovered, so as to maintain a high VOCs recovery rate and a higher concentration of VOCs after desorption of the auxiliary adsorption bed, which also makes the condensation efficiency higher and condensation energy consumption. lower.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only of the present invention. For some embodiments of the present invention, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the schematic diagram of the VOCs normal temperature condensation treatment system utilizing activated carbon static activity of the present invention;

Among them, 1 is VOCs pretreatment system, 2 is adsorption fan, 3 is nitrogen source, 4 is online oxygen content detector, 5 is gas-air heat exchanger, 6 is normal temperature condensation system, 7 is three-way butterfly valve, 8 is dehydrator With fan, 9 is heater, 10 is stop valve.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The purpose of this utility model is to provide a VOC room temperature condensation treatment system utilizing the static activity of activated carbon, so as to solve the problems existing in the above-mentioned prior art, make full use of the adsorption capacity of activated carbon, save the use of activated carbon, and realize the utilization of conventional high-efficiency cold sources at the same time. Even natural cold source liquefaction recovers VOCs, which greatly reduces condensation energy consumption and equipment costs.

In order to make the above objects, features and advantages of the present utility model more clearly understood, the present utility model will be described in further detail below with reference to the accompanying drawings and specific embodiments.

The utility model provides a room temperature condensation treatment system for VOCs using the static activity of activated carbon and a method thereof. As shown in FIG. 1, the system includes: two parallel adsorption beds A and B, an auxiliary adsorption bed C, VOCs Pretreatment system 1, nitrogen supplementary system and desorption condensation system. The adsorption bed A and the adsorption bed B are connected to the VOCs pretreatment system 1 and the adsorption fan 2 through the adsorption inlet valve Aa1 and the adsorption inlet valve Ba1, and are connected to the atmosphere through the adsorption outlet valve Aa2 and the adsorption outlet valve Ba2. Beds B are connected through series valve Ab and series valve Ba; adsorption bed A, adsorption bed B and auxiliary adsorption bed C are connected through desorption condensation valve Ad1, desorption condensation valve Ad2, desorption condensation valve Bd1, and desorption condensation valve Bd2 , Desorption condensing valve Cd1, desorption condensing valve Cd2 are connected with desorption condensing system, desorption condensing system includes gas-air heat exchanger 5, normal temperature condensing system 6, three-way butterfly valve 7, desorption fan 8, heater 9 and Stop valve 10; the nitrogen supplementary system is connected to the desorption condensation pipeline through the nitrogen supplementary valve n1 and the nitrogen supplementary valve n2, and the other side of the nitrogen supplementary valve n2 is connected to the adsorption pipeline at the front end of the VOCs pretreatment system 1, and the nitrogen supplementary system includes a nitrogen source 3 and the online oxygen content detector 4; the auxiliary adsorption bed C is also connected to both sides of the stop valve 10 through the valve Cp1 and the valve Cp2.

The steps of the processing method of the present invention are as follows:

Step 10. In the equipment debugging stage, close all adsorption inlet valves Aa1, adsorption inlet valves Ba1, all adsorption outlet valves Aa2, adsorption outlet valves Ba2, open all remaining valves, and then turn on the nitrogen source, and connect the system pipes and equipment to the All gases are replaced with nitrogen, and when the online oxygen content detector 4 shows that the oxygen content is lower than 5%, all valves and nitrogen sources 3 are closed.

Step 20, synchronously open the adsorption fan 2 with the production line, open the adsorption inlet valve Aa1 and the adsorption outlet valve Aa2, the organic waste gas is cooled by the pretreatment system to remove particles and then sent to the adsorption bed A, and discharged into the atmosphere after the purification reaches the standard;

Step 30. When the displayed value of the VOCs concentration sensor Av behind the adsorption bed A reaches 50% of the emission standard, close the adsorption valve Aa2, open the series valve Ab, increase the frequency of the adsorption fan 2 to keep the adsorption air volume unchanged, and the adsorption bed B is connected in series After the adsorption bed A, the exhaust gas passes through the adsorption bed A and the adsorption bed B in turn and is discharged into the atmosphere until the VOCs concentration sensor Av shows that the adsorption bed A has reached the saturated adsorption capacity, and the adsorption cannot be continued. Then the adsorption bed A enters the desorption stage, and the adsorption fan is lowered. The frequency of 2 keeps the adsorption air volume unchanged, and the adsorption bed B continues to adsorb;

Step 40, before the adsorption bed A is desorbed, open the nitrogen supplementary valve n1, the nitrogen supplementary valve n2 and the nitrogen source 3, replace the gas in the adsorption bed A with nitrogen and send it into the adsorption pipeline, when the online oxygen content detector 4 displays oxygen When the content is less than 5%, close the nitrogen supplementary valve n1, nitrogen supplementary valve n2 and nitrogen source 3; then open the desorption condensing valve Ad1, the desorption condensing valve Ad2, the stop valve, the desorption fan and the heater in turn, and the three-way butterfly valve switches When the VOCs concentration sensor Cv display value reaches the condensing concentration, open the condensing system until no condensate flows out;

Step 50: At this time, no VOCs are desorbed from the adsorption bed A, but the residual VOCs condensation in the adsorption bed A will affect the adsorption efficiency of the next cycle. Therefore, the residual VOCs in the adsorption bed A need to be transferred to the auxiliary adsorption bed C. Close the stop valve 10, open the valve Cp1 and the valve Cp2, switch the three-way butterfly valve 7 to the I channel and the II channel, increase the frequency of the desorption fan 8 to keep the desorption air volume unchanged, and the high temperature from the adsorption bed A is high. After cooling, the concentrated VOCs gas is sent to the adsorption bed C for adsorption and becomes a low-concentration gas for reheating. At this time, the VOCs in the adsorption bed A can continue to be desorbed until the VOCs concentration sensor Cv shows that there is no more VOCs in the adsorption bed A. Attached, then open the stop valve 10, close the valve Cp1, the valve Cp2 and the heater, cool down the activated carbon in the adsorption bed A, and then turn off the desorption fan 2, the condensation system 6, the desorption condensation valve Ad1, and the desorption condensation. Valve Ad2 and globe valve 10;

Step 60. When the display value of the VOCs concentration sensor Bv behind the adsorption bed B reaches 50% of the emission standard, close the adsorption valve Ba2, open the series valve Ba, increase the frequency of the adsorption fan 2 to keep the adsorption air volume unchanged, and the adsorption bed A is connected in series After the adsorption bed B, the exhaust gas passes through the adsorption beds B and A in turn and is discharged into the atmosphere until the VOCs concentration sensor Bv shows that the adsorption bed B has reached the saturated adsorption capacity, and the adsorption cannot be continued. Then the adsorption bed B enters the desorption stage, reducing the adsorption fan 2. The frequency keeps the adsorption air volume unchanged, and the adsorption bed A continues to adsorb;

Step 70. Before desorption of the adsorption bed B, open the nitrogen supplementary valve n1, the nitrogen supplementary valve n2 and the nitrogen source 3, replace the gas in the adsorption bed B with nitrogen and send it into the adsorption pipeline, when the online oxygen content detector 4 displays oxygen When the content is less than 5%, close the nitrogen supplement valve n1, nitrogen supplement valve n2 and nitrogen source 3; then open the desorption condensing valve Bd1, the desorption condensing valve Bd2, the stop valve 10, the desorption fan 8 and the heater 9 in turn, three The butterfly valve 7 is switched to the I passage and the III passage. At this time, the high temperature nitrogen will desorb the VOCs in the adsorption bed B. When the VOCs concentration sensor Cv display value reaches the condensing concentration, the condensing system 6 is turned on until no condensate flows out;

Step 80: At this time, no VOCs are desorbed from the adsorption bed B, but the residual VOCs condensation in the adsorption bed B will affect the adsorption efficiency of the next cycle. Therefore, the residual VOCs in the adsorption bed B need to be transferred to the auxiliary adsorption bed C. Close the stop valve 10, open the valves Cp1\Cp2, switch the three-way butterfly valve 7 to the I channel and the II channel position, increase the frequency of the desorption fan 8 to keep the desorption air volume unchanged, and the high temperature and high concentration from the adsorption bed B After the VOCs gas is cooled, it is sent to the adsorption bed C for adsorption and becomes a low-concentration gas and then heated. At this time, the VOCs in the adsorption bed B can continue to be desorbed until the VOCs concentration sensor Cv shows that there is no more VOCs in the adsorption bed B desorbed. out, then open the stop valve 10, close the valves Cp1\Cp2 and the heater, cool down the activated carbon in the adsorption bed B, and then turn off the desorption fan 2, the condensation system 6, the desorption condensation valve Bd1, and the desorption condensation valve Bd2 in turn. and shut-off valve 10;

Step 90, repeat the above steps 30-80

Step 100, when the VOCs concentration sensor Dv behind the auxiliary adsorption bed C shows that the adsorption bed C has reached the transfer limit, open the desorption condensation valve Cd1, the desorption condensation valve Cd2, and the cut-off valve 10, and switch the three-way butterfly valve to the I channel, At passage III, turn on the desorption fan 8 and the heater 9. When the displayed value of the VOCs concentration sensor Cv reaches the condensing concentration, turn on the condensing system 6 until no condensate flows out, turn off the heater 9, and cool the activated carbon in the adsorption bed C. down.

For a given activated carbon, the saturated adsorption amount qb depends on the VOCs emission concentration, exhaust air temperature and the type of VOCs; the condensation concentration Cc depends on the type of VOCs and condensation temperature; the VOCs condensation residual amount qr depends on the desorption temperature and condensation concentration Cc; The transfer limit qc depends on the condensation temperature and the desorption concentration Cd; mc(qc-qr)≥Nmqr, when designing the auxiliary adsorption bed, an equal sign can be used to calculate the amount of activated carbon, and 20% of the surplus is reserved, where N represents the number of transfers .

The principles and implementations of the present utility model are described with specific examples in the present utility model, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present utility model; meanwhile, for those skilled in the art , according to the idea of the present utility model, there will be changes in the specific implementation and application scope. In conclusion, the content of this specification should not be construed as a limitation on the present invention.

Claims (7)

1. a VOC normal temperature condensation treatment system utilizing active carbon static activity is characterized in that: comprise VOCs pretreatment system, desorption condensation system and auxiliary adsorption bed C, and one side of described auxiliary adsorption bed C is provided with two parallel adsorption Bed A and adsorption bed B; the adsorption bed A is connected with the adsorption fan through the adsorption inlet valve Aa1, and the adsorption bed B is connected with the adsorption fan through the adsorption inlet valve Ba1; the adsorption fan is connected with the VOCs Pretreatment system; described adsorption bed A is connected with the atmosphere through adsorption outlet valve Aa2, and described adsorption bed B is connected with the atmosphere through adsorption outlet valve Ba2; between described adsorption bed A and adsorption bed B, through series valve Ab and series valve Ba is serially closed and connected; the two ends of the adsorption bed A are connected to the two ends of the desorption condensation system through the desorption condensation valve Ad1 and the desorption condensation valve Ad2 respectively, and the two ends of the adsorption bed B are respectively connected to the two ends of the desorption condensation system through the desorption condensation valve Bd1 and the desorption condensation valve. The condensation valve Bd2 is connected to both ends of the desorption condensation system, and the two ends of the adsorption bed C are respectively connected to both ends of the desorption condensation system through the desorption condensation valve Cd1 and the desorption condensation valve Cd2. 2. The VOC normal temperature condensation treatment system utilizing activated carbon static activity as claimed in claim 1, is characterized in that: described adsorption bed A, adsorption bed B operating conditions include single bed adsorption, front series adsorption, desorption condensation, purification Transfer, post-series adsorption, the auxiliary adsorption bed C operating conditions include auxiliary adsorption and desorption condensation. 3. The VOC normal temperature condensation treatment system utilizing the static activity of activated carbon according to claim 1, is characterized in that: the desorption condensation system comprises a gas-air heat exchanger, a normal temperature condensation system, a three-way butterfly valve, Desorption fan, shut-off valve and heater; the three-way butterfly valve includes I passage, II passage and III passage, the normal temperature condensation system is connected with I passage, the desorption fan is connected with II passage, and the II passage is connected with The connecting pipeline between the desorption fans is connected with a first branch connected to the gas-gas heat exchanger, and the III passage is connected to the gas-gas heat exchanger through a second branch; the auxiliary The adsorption bed C is connected to both ends of the stop valve through the valve Cp1 and the valve Cp2; the desorption condensation valve Ad1, the desorption condensation valve Bd1 and the desorption condensation valve Cd1 are connected to the heater through the first desorption condensation pipeline , the desorption condensation valve Ad2, the desorption condensation valve Bd2 and the desorption condensation valve Cd2 are connected to the gas-gas heat exchanger through a second desorption condensation pipeline. 4. The VOC normal temperature condensation treatment system utilizing the static activity of activated carbon according to claim 3, is characterized in that: it also comprises a nitrogen supplement system, and the nitrogen supplement system comprises a nitrogen source and an on-line oxygen content detector, and the nitrogen source passes through The nitrogen supplementary valve n1 is connected with the second desorption condensation pipeline, the first desorption condensation pipeline is connected with a nitrogen supplementary valve n2, and the nitrogen supplementary valve n2 is adsorbed by the online oxygen content detector with the front end of the VOCs pretreatment system. The pipes are connected. 5. The VOC normal temperature condensation treatment system utilizing the static activity of activated carbon according to claim 3 is characterized in that: a VOCs concentration sensor Av is arranged between the adsorption bed A and the adsorption outlet valve Aa2, and the adsorption bed B is provided with a VOCs concentration sensor Av. A VOCs concentration sensor Bv is arranged between the adsorption and gas outlet valve Ba2, a VOCs concentration sensor Cv is arranged between the gas-air heat exchanger and the normal temperature condensation system, and one end of the shut-off valve is between the valve Cp2. A VOCs concentration sensor Dv is provided. 6 . The VOC room temperature condensation treatment system utilizing the static activity of activated carbon according to claim 3 , wherein the room temperature condensation system comprises a VOCs liquid storage tank and a room temperature condenser, and the room temperature condenser can use a natural cold source. 7 . 7 . The VOC room temperature condensation treatment system utilizing the static activity of activated carbon according to claim 3 , wherein the adsorption fan and the desorption fan are both explosion-proof frequency conversion fans. 8 .

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