KR101103249B1 - Hybrid filter system - Google Patents

Abstract

The hybrid filter system 100 of the present invention includes a filter system main body (2) provided with a hybrid filter portion (4) carrying a catalyst so that the introduced dust and volatile organic compounds are discharged through the system, and the dust and volatile organic compounds. A heater 30 suitable for heating the active temperature of the catalyst in the main body 2, an inlet blower 50 for introducing and discharging dust and volatile organic compounds discharged from the main body 2, and the main body 2; A control unit 70 for controlling the operation of the heater 30 to maintain the hybrid filter unit 4 at an appropriate temperature, an overheat prevention means for preventing overheating of the main body 2, and backwashing during backwashing. And pressure holding means for keeping the pressure constant.

Accordingly, the present invention uses a hybrid filter loaded with a high efficiency volatile organic compound removal catalyst to form a single system integrating a volatile organic compound processing device and a dust collecting system, which have been operated separately, thereby volatile organic compounds and fine dust At the same time, as it can be efficiently removed, the post-treatment facilities of the prior art are simplified, operation is convenient, and additionally, there are effects such as reduction of equipment cost and convenience of operation and maintenance.

Hybrid filter, dust, volatile organic compounds, overheating prevention, backwashing, pressure maintenance

Description

Hybrid filter system {HYBRID FILTER SYSTEM}

The present invention relates to a hybrid filter system, and more particularly, to a hybrid filter system capable of efficiently removing volatile organic compounds and fine dust generated at an industrial site simultaneously.

As is well known, volatile organic compounds and fine dust are emitted in industrial sites that perform paint manufacturing processes, petrochemical processes, etc., and volatile organic compound treatment devices are used to remove volatile organic compounds. Is using a dust collection system for removal.

 As a related patent, Korean Patent No. 10-0666269 entitled "Hybrid System Process Combining a Tubular Photocatalytic Reactor and a Biofilter for Efficiently Removing Volatile Organic Compounds or Odors" is disclosed in Korean Patent Application No. 10-0666269. Photocatalyst coated glass tube with photocatalyst coating on certain part of waste gas discharge pipe, and the pipe itself is used as a reactor without a separate photocatalytic reactor by placing a light source, and a biofilter system at the rear side to efficiently use volatile organic compounds and odors. It is starting to process.

As another example, the name of the invention of Korean Patent No. 10-0403287 is "hybrid dust collection system combined with multi-stage porous plates", which is finely influenced by the impact by the optimal combination of the multi-stage porous plates and the vortex diffusion effect by the turbulent recirculating flow. In order to increase the dust collection effect even in the particle range and prevent dust particles from re-spreading, a special structure system is provided in which a round jaw is installed around each hole.

In addition, Korean Patent No. 10-0766272, entitled "UV (or Visible Light) / Photocatalytic Oxidation, Hybrid Tank Process Combining Mixture Tank and Biofilter", measures the degree of contamination of waste gas generated in industrial sites and measures UV Disclosed is a treatment apparatus using a recycling apparatus combined with a photocatalytic reactor and a biofilter, and efficiently controlling waste gas by controlling the inflow into a catalytic reactor or a recycling apparatus according to the degree of contamination.

In addition to these patents, catalytic oxidation, activated carbon adsorption, biofilters, etc. are used to remove volatile organic compounds in frontline industrial sites. However, most of these prior arts have high efficiency in removing volatile organic compounds in the inflow of fine dust. There is a problem that can greatly reduce the situation, and is operating by installing a separate fine dust removal device as a pre-treatment facility, as in the prior art, a volatile organic compound treatment device and a dust collection system separately for each dust and organic compound, respectively Since the operation was performed, the equipment of the apparatus is expensive, and its operation and maintenance are inconvenient.

Accordingly, an object of the present invention is to integrate the volatile organic compound processing device and the dust collection system that were operated separately, thereby improving the fine dust removal efficiency, thereby reducing the equipment cost compared to the existing equipment, and the hybrid filter which can be easily operated and maintained. To provide a system.

The hybrid filter system of the present invention for achieving the above object is a filter system main body is provided with a hybrid filter portion carrying a catalyst so that the introduced dust and volatile organic compounds pass through, and the dust and volatile organic compounds of the catalyst in the system main body A heater suitable for heating to an active temperature, an inlet blower for introducing and discharging dust and volatile organic compounds discharged from the main body, a controller for controlling the operation of the heater to maintain the hybrid filter part of the main body at an appropriate temperature, and overheating of the main body. It includes a means for preventing overheating and a pressure holding means for maintaining a constant backwashing pressure during backwashing.

The overheat prevention means includes a thermocouple installed in the main body, an inflow flow rate control valve for controlling the flow rate of the inflow gas into the main body, and a recirculation amount control valve for controlling the recirculation amount at which a part of the processing gas of the inlet blower is recycled to the main body. And a process gas recirculation line connecting the inlet line for introducing the dust and volatile organic compounds passed through the heater to the main body and the exhaust line of the inlet blower.The inlet flow control valve and the recirculation control valve It operates to interlock, and a part of the processing gas of the inlet blower flows into the main body.

The pressure holding means includes a solenoid valve for adjusting the back washing line installed in the back washing line connecting the exhaust line of the inlet blower and the upper part of the filter part installed in the main body, and a differential pressure transmitter for detecting a pressure difference between the upper and lower parts of the filter part installed in the main body. When the differential pressure is sensed by the transmitter, the solenoid valve for adjusting the back washing line is operated so that a part of the exhaust gas of the inlet blower flows into the upper part of the filter unit in the main body to remove dust.

In the present invention, the reverse washing line is provided with a solenoid valve for controlling the filling of the back washing tank from the inlet blower, a compressor, a check valve, and a back washing tank, and the back washing tank is provided with a constant pressure transmitter. When the constant pressure is detected by the back washing tank filling solenoid valve and the compressor is preferably operated, the back washing tank and the subsequent back washing line is preferably insulated.

According to the present invention, as a system integrating a volatile organic compound processing device and a dust collecting system that were operated separately separately using a hybrid filter carrying a high-efficiency volatile organic compound removal catalyst of a low-cost material developed as a medium density ceramic filter By constructing, the volatile organic compounds and fine dust can be efficiently removed at the same time, thereby simplifying the post-treatment facilities of the prior art, making the operation convenient, and consequently, reducing the cost of equipment, convenience of operation and maintenance, and the like.

Hereinafter, with reference to the accompanying drawings will be described in detail the operation of an embodiment according to the present invention.

1 shows a configuration diagram of a hybrid filter system according to the present invention. As shown, the hybrid filter system of the present invention comprises a filter system main body 2 provided with a hybrid filter part 4 on which a catalyst is loaded, and dust and volatile organic compounds introduced into the main body 2 as catalysts in the main body 2. A heater 30 suitable for heating to an active temperature of the main body, an inlet blower 50 for introducing and discharging dust and volatile organic compounds discharged from the main body 2, and a hybrid filter unit 4 of the main body 2; And a controller 70 for controlling the operation of the heater 30 to maintain the proper temperature.

The heater 30 is installed in the inlet line 20 for introducing dust and volatile organic compounds into the body 2 in the industrial site, the inlet line 20 is connected to the inlet 14 of the body 2, Exhaust gas from which dust and volatile organic compounds have been removed while passing through the filter unit 4 is discharged through the discharge line 10, and the discharge line 10 is an outlet 16 and an inlet blower 50 of the main body 2. And a heat exchanger 12 is provided.

The exhaust line 40 of the inlet blower 50 is interposed with a recirculation amount regulating valve 64 for adjusting the recirculation amount of the processing gas, and the inlet between the control valve 64 and the heater 30 and the main body 2. A process gas recirculation line 60 having an inflow flow rate control valve 62 interposed therebetween to connect the line 20 is connected, and an exhaust line 40 in front of the recirculation rate control valve 64 so that a part of the exhaust gas branches. The back washing line 80 which is branched from and connects with the upper part of the main body 2 is connected.

The back washing line 80 is provided with a solenoid valve 81 for controlling the filling of the back washing tank from the exhaust line 40 of the inlet blower 50, a compressor 83, a check valve 85, and a back washing tank 87. And, the solenoid valve 82 for the back washing line adjustment is provided in sequence. The solenoid valve 82 for backwash line adjustment is operated by a differential pressure transmitter 84 for detecting a pressure difference above and below the filter part 4 of the main body 2, whereby a part of the exhaust gas of the inlet blower 50 is transferred to the main body. The dust adhering to the upper part of the filter part 4 in (2) and stuck to the surface of the filter is detached and removed to the lower part of the main body 2. In addition, the backwash tank 87 is provided with a constant pressure transmitter 89, and when the pressure of the backwash tank 87 is sensed by the constant pressure transmitter 89 at a constant pressure, the solenoid valve 81 for filling the backwash tank and The compressor 83 operates automatically.

On the other hand, the body 2 is provided with a thermocouple 18 for sensing the temperature, the control unit 70 controls the on / off of the heater 30 in accordance with the detection signal of the thermocouple 18 of the main body 2 By preventing overheating and also allowing the inflow flow rate control valve 62 and the recirculation rate control valve 64 to operate in response to the detection signal of the thermocouple 18, a part of the processing gas of the inlet blower 50 is recycled. Automatically recycled through 60 is introduced into the main body (2).

Referring to the operation of the hybrid filter system of the present invention configured as described above are as follows.

Fine dust and volatile organic compounds generated at industrial sites such as paint manufacturing process and petrochemical process are introduced into the system main body 2 by the inlet blower 50 installed at the rear of the hybrid filter system 100. By operating the heater 30 and heating the fine dust and the volatile organic compound to an appropriate temperature according to the activation temperature of the catalyst supported on the hybrid filter unit 4 installed in the main body 2, the volatile organic compound is hybridized. The filter part 4 is stably and effectively removed. At this time, the control unit 70 controls the heater 30 to perform the ON / OFF operation according to the signal of the thermocouple 18 installed in the main body 2 to prevent the main body 2 from overheating.

In addition, in the hybrid filter system of the present invention, although the dust is fixed to the filter surface after a certain time has elapsed, as the dust is stuck to the lower part of the main body 2 by backwashing at a predetermined time interval, Incoming dust and volatile organic compounds are effectively removed simultaneously. That is, when the dust load applied to the filter unit 4 of the main body 2 increases, a pressure difference occurs above and below the filter unit 4, and the differential pressure transmitter 84 detects the pressure difference. As a result, the solenoid valve 82 for controlling the back washing line is opened so that a part of the exhaust gas of the inlet blower 50 flows into the upper part of the filter part 4 of the main body 2 through the back washing line 80. Dust will be removed. At this time, when cold gas is used for dust backwashing, the filter unit 4 operating in the high temperature region may be damaged due to thermal shock, and thus branching to the backwashing line 80 in consideration of this. Part of the exhaust gas of the inlet blower 50 to be released in accordance with the constant signal of the constant pressure transmitter 89 installed in the backwash tank 87, the compressor 83 is operated as the backwash amount adjustment solenoid valve 81 is opened. It is configured to maintain the pressure automatically. In addition, the backwash tank 87 and the backwash line 80 between the backwash tank 87 and the main body 2 were insulated.

On the other hand, in the case of industrial sites where various variables are applied, when the concentration of volatile organic compounds in the polluting gas flowing in is high or the excessive excess volume of harmful gas is discharged, the main body may be oxidized by the oxidation of the catalyst supported in the hybrid filter unit 4. The temperature in 2) rises sharply. In the present invention, when the main body 2 is overheated as described above, the inflow flow rate control valve 62 and the recirculation rate control valve 64 operate in conjunction with the detection signal of the thermocouple 18 installed in the main body 2. As a result, a part of the processing gas of the inlet blower 50 is recycled through the recirculation line 60 and flows into the main body 2. Thus, the present invention controls the inflow amount flowing into the main body 2, thereby filtering the filter unit ( 4) The catalyst is prevented from being rapidly oxidized to prevent overheating of the main body 2.

As described above, the hybrid filter system of the present invention can perform stable operation by controlling the amount of inlet and forward gas flow through the thermocouple 18 installed in the main body 2 and controlling the heater 30, and a part of the process gas Compression is used for filter backwashing to increase the efficiency of the filter system.

In the prior art, the process is focused on the removal and reduction of dust collection and volatile organic compounds, respectively, and the system is mostly divided into two processes. However, the hybrid filter system of the present invention has a single process of dust and volatile organic compounds. At the same time, the compound is removed at the same time, and a part of the process gas is recycled to flow into the backwash and the inlet line of the system to extend the life of the hybrid filter, and to prevent the overheating function for the stable operation of the system.

What has been described above is only one preferred embodiment of the hybrid filter system according to the present invention, and the present invention is not limited to the above-described embodiment, and therefore, the subject matter of the present invention as claimed in the following claims. Without departing from the technical spirit of the present invention to the extent that any person of ordinary skill in the art to which the present invention pertains various modifications can be made.

1 is a block diagram of a hybrid filter system of the present invention.

<Explanation of symbols for major symbols in the drawings>

2 main body 4 filter unit

10: discharge line 12: heat exchanger

14 inlet port 16 outlet

18: thermocouple 20: inlet line

30: heater 40: exhaust line

50: inlet blower 60: treatment gas recirculation line

62: inflow flow control valve 64: recirculation flow control valve

70: heater control unit 80: backwash line

81: solenoid valve for filling control of backwash tank

82: solenoid valve for backwash line adjustment 83: compressor

84: differential pressure transmitter 85: check valve

87: backwash tank 89: constant pressure transmitter

Claims (6)

As a hybrid filter system, A filter system body provided with a hybrid filter part carrying a catalyst so that the introduced dust and volatile organic compounds pass out; A heater for heating dust and volatile organic compounds appropriately for the activation temperature of the catalyst in the system body; An inlet blower for introducing and discharging dust and volatile organic compounds discharged from the main body; A control unit controlling an operation of the heater to maintain the hybrid filter unit of the main body at an appropriate temperature; Overheat prevention means for preventing overheating of the main body, A pressure holding means for maintaining a constant back washing pressure during back washing; Hybrid filter system. The method of claim 1, The overheat prevention means A thermocouple installed on the main body, An inflow flow rate control valve for controlling the flow rate of the inflow gas to the main body, and a recirculation amount control valve for controlling the recycle amount of the processing gas to which a part of the processing gas of the inlet blower is recycled to the main body; It includes a process gas recirculation line connecting the inlet line and the exhaust line of the inlet blower and the dust and volatile organic compounds passing through the main body, The inflow flow rate control valve and the recirculation rate control valve are interlocked according to the detection signal of the thermocouple to introduce a portion of the processing gas of the inlet blower into the main body. Hybrid filter system. The method of claim 1, The pressure holding means A solenoid valve for adjusting a back washing line installed in a back washing line connecting an exhaust line of the inlet blower and an upper portion of a filter unit installed in the main body; And a differential pressure transmitter for detecting a pressure difference between upper and lower filter units installed in the main body. When the differential pressure is sensed by the differential pressure transmitter, the solenoid valve for adjusting the reverse washing line is operated so that a part of the exhaust gas of the inlet blower flows into the upper part of the filter unit in the main body to remove dust. Hybrid filter system. The method of claim 3, wherein The backwash line is provided with a solenoid valve for regulating backwash tank filling, a compressor, a check valve, and a backwash tank sequentially from an exhaust line of the inlet blower. Hybrid filter system. The method of claim 4, wherein The backwash tank is provided with a constant pressure transmitter, and when the constant pressure is detected by the constant pressure transmitter, the solenoid valve for filling the backwash tank and the compressor are operated. Hybrid filter system. The method of claim 4, wherein The backwash tank and the backwash line between the backwash tank and the main body are insulated. Hybrid filter system.

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