CN213492849U

CN213492849U - Active carbon box for adsorbing VOCs

Info

Publication number: CN213492849U
Application number: CN202021815576.0U
Authority: CN
Inventors: 晋晓旭
Original assignee: Yixing City Tengfa Environmental Protection Water Treatment Equipment Co ltd
Current assignee: Yixing City Tengfa Environmental Protection Water Treatment Equipment Co ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-06-22
Anticipated expiration: 2030-08-27

Abstract

The utility model provides an adsorb VOCs's active carbon case, mainly used volatile organic compounds's adsorption treatment, including intake pipe, gas distribution pipe, active carbon case, outlet duct, install relief valve, spark arrester, manual blast gate and catch water in proper order along the air current direction in the intake pipe, the terminal intercommunication gas distribution pipe of catch water, the pretreatment chamber of active carbon bottom of the case portion is connected respectively to the gas distribution pipe exit end, active carbon incasement portion divide into lower part adsorbed layer and upper portion net gas layer through the screen cloth, an outlet duct is equipped with at 7 tops of active carbon case, outlet duct and the inside net gas layer intercommunication of active carbon incasement portion. The device has the characteristics of simple structure, low operation cost and high removal efficiency.

Description

Active carbon box for adsorbing VOCs

Technical Field

The utility model relates to an air purification device, mainly used volatile organic compound's adsorption treatment.

Background

The pollution problem of Volatile Organic Compounds (VOCs) has attracted much attention all over the world, and countries have gone through relevant laws to limit the emission of VOCs, but cannot completely stop the emission of VOCs. The purification treatment method of the VOCs comprises a catalytic combustion method, a condensation method, a biochemical method, a membrane separation method, an adsorption method and the like, wherein the activated carbon adsorption method is a method with low cost, good purification effect and most extensive application, and the general VOCs waste gas contains water vapor, so that the activated carbon can be quickly saturated after adsorption, most of VOC can not be adsorbed, and how to fully utilize the adsorption capacity of the activated carbon is a difficult problem in the prior development of VOCs adsorption devices.

The prior patent (application number: CN201621232643. X) discloses a device for treating malodorous gas by ozone and active carbon combination method, which is characterized by comprising an ozone generator, a water spray cooling device, an active carbon adsorption tank, an induced draft fan and a pipeline, wherein part of ozone generated by the ozone generator and malodorous tail gas to be treated enter the water spray cooling device through the pipeline, the other part of ozone and the tail gas after temperature reduction and reaction with ozone enter the active carbon adsorption tank at the same time, part of ozone enters the adsorption tank from the side surface of the adsorption tank, the tail gas in the active carbon adsorption tank is purified after being adsorbed by active carbon fibers and active carbon particles, the active carbon fibers and the active carbon particles are activated by the ozone at the same time, and the tail gas is exhausted into the atmosphere from the lower part of the active carbon adsorption tank under the action of the induced draft fan. The method treats the stink tail gas in feed processing and the waste gas in a sewage treatment plant, the removal rate of the stink substances reaches more than 99 percent, and the system can run uninterruptedly. However, the preparation of ozone and the operation energy consumption of the induced draft fan are high, the cost is difficult to reduce, and the adsorption effect of the active carbon on harmful gases can be influenced by adding the spraying device.

Disclosure of Invention

The utility model aims at providing a novel VOCs active carbon adsorption case that simple structure, running cost hang down, get rid of efficiently to the not enough of current device existence.

The active carbon box comprises an air inlet pipe, an air distribution pipe, an active carbon box and an air outlet pipe, wherein a pressure release valve, a flame arrester, a manual air valve and a steam-water separation device are sequentially installed in the air inlet pipe along the air flow direction, the tail end of the steam-water separation device is communicated with the air distribution pipe, the outlet end of the air distribution pipe is connected with a pretreatment chamber at the bottom of the active carbon box, the inside of the active carbon box is divided into a lower adsorption layer and an upper air purification layer through a screen, the top of the active carbon box is provided with the air outlet pipe, and the air outlet pipe is communicated with the air purification layer inside the active carbon box.

Contain VOCs waste gas and get into the intake pipe after respectively through catch water and preprocessing device and remove aqueous vapor, waste gas reentrant activated carbon box's adsorbed layer carries out getting rid of VOCs, then converges into the outlet duct outflow behind the gas purification layer through the screen cloth, and the screen cloth is used for preventing that the air current is too big blows out the box with the active carbon granule outside.

Furthermore, the adsorption layer is divided into 4 channels, each channel is provided with 4 activated carbon boxes from top to bottom, and the bottom of the activated carbon box at the bottommost layer is connected with the outlet end of the pretreatment chamber.

Furthermore, the bottom of the activated carbon box adopts a silk screen to contain activated carbon particles, and the waste gas passes through each activated carbon box from bottom to top in sequence for adsorption and purification.

Furthermore, the activated carbon box is drawer-shaped, the opening position of the drawer is tightly connected with the activated carbon box through a fastening bolt, so that gas in the box body can be prevented from overflowing in the working state, and the drawer-type box is convenient to replace in maintenance.

Furthermore, drain valves are arranged at the lower ends of the steam-water separation device and the air distribution pipe and used for discharging water vapor intercepted in the steam-water separation device and the pretreatment chamber.

Further, detecting instrument and passageway conversion equipment are installed along the air current direction in proper order to the outlet duct exit end, and passageway conversion equipment connects exhaust pipe and back flow respectively, if detecting instrument surveys that the VOCs content of giving vent to anger reaches standard, passageway conversion equipment switch-on exhaust pipe exhaust air after the purification, if not up to standard, then passageway conversion equipment switch-on back flow, gas is discharged the intake pipe again and is carried out secondary purification.

Furthermore, the air inlet pipe and the activated carbon box are fixed on the support through the support.

The utility model has the advantages that:

1. the adsorption capacity of the activated carbon can be fully exerted by utilizing the pretreatment in the early stage to remove water vapor twice and the multi-layer activated carbon adsorption process in the later stage.

2. And the mode of air outlet on the lower air inlet is utilized, so that the waste gas containing VOCs is removed without power, and the operation cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of the utility model.

In the figure: 1 pressure release valve, 2 flame arrestors, 3 manual air valves, 4 steam-water separation devices, 5 drain valves, 6 air inlet pipes, 7 activated carbon boxes, 7.1 adsorption layers, 7.2 air purification layers, 8 air distribution pipes, 9 pretreatment chambers, 10 activated carbon boxes, 11 screens, 12 air outlet pipes, 13 detection instruments, 14 channel conversion devices, 15 return pipes, 16 exhaust pipes and 17 supports.

Detailed Description

Example 1: an activated carbon box for adsorbing VOCs comprises an air inlet pipe 6, an air distribution pipe 8, an activated carbon box 7 and an air outlet pipe 12, wherein the air inlet pipe 6 is sequentially provided with a pressure release valve 1, a flame arrester 2, a manual air valve 3 and a steam-water separation device 4 along the airflow direction, the tail end of the steam-water separation device 4 is communicated with the air distribution pipe 8, and drain valves 5 are respectively arranged at the lower ends of the steam-water separation device 4 and the air distribution pipe 8 and used for discharging water vapor trapped in the steam-water separation device 4 and a pretreatment chamber 9; the outlet end of the air distribution pipe 8 is respectively connected with a pretreatment chamber 9 at the bottom of the activated carbon box 7, and the inside of the activated carbon box 7 is divided into a lower adsorption layer 7.1 and an upper air purification layer 7.2 through a screen 11; the adsorption layer 7.1 is divided into 4 channels, each channel is provided with 4 activated carbon boxes 10 from top to bottom, the activated carbon boxes 10 are drawer-shaped, the bottom of the box body adopts a silk screen to contain activated carbon particles, and the bottom of the activated carbon box 10 at the bottommost layer is connected with the outlet end of the pretreatment chamber 9; the top of the activated carbon box 7 is provided with an air outlet pipe 12, and the air outlet pipe 12 is communicated with a purified gas layer 7.2 in the activated carbon box 7; the outlet end of the air outlet pipe 12 is sequentially provided with a detection instrument 13 and a channel switching device 14 along the airflow direction, and the channel switching device 14 is respectively connected with an exhaust pipe 16 and a return pipe 15; the air inlet pipe 6 and the activated carbon box 7 are both fixed on the support 17 through a bracket.

During adsorption filtration, contain VOCs waste gas and get into intake pipe 6 after respectively through catch water 4 and preprocessing device 9 removal of vapor, waste gas reentries the adsorbed layer of active carbon case 7 again and carries out getting rid of VOCs, then discharge into outlet duct 12 after gathering into gas purification layer 7.2 through screen cloth 11 and flow, gas result detecting instrument 13 after the purification detects VOCs concentration, if detecting instrument surveys that the VOCs content of giving vent to anger reaches standard, the air after 16 exhaust purifications of passageway conversion device switch-on exhaust pipe, if not up to standard, then passageway conversion device 16 switches on back flow 15, gas is discharged intake pipe 6 again and is carried out secondary purification.

When the device is overhauled, firstly opening the pressure release valve 1 to balance the internal and external pressure of the device, then closing the manual air valve 3 to block the connection between the equipment and the air inlet source, preventing the waste gas containing VOCs from damaging maintainers, and finally opening the fastening bolt on the activated carbon box 10 by using a special tool to pull out the carbon box for replacement; if accidental fire happens, the flame arrester 2 is started immediately to cut off the air inlet source and the treatment equipment.

Claims

1. The utility model provides an adsorb VOCs's active carbon case, includes intake pipe, gas distribution pipe, active carbon case, outlet duct, its characterized in that: install relief valve, spark arrester, manual blast gate and water separator in proper order along the air current direction in the intake pipe, the terminal intercommunication gas distribution pipe of water separator, the pretreatment chamber of activated carbon tank bottom portion is connected to the gas distribution pipe exit end, activated carbon tank inside divide into lower part adsorbed layer and upper portion gas purification layer through the screen cloth, activated carbon tank top is equipped with an outlet duct, outlet duct and the inside net gas layer intercommunication of activated carbon tank.

2. An activated carbon canister for adsorbing VOCs as claimed in claim 1, wherein: the adsorption layer is divided into channels, each channel is provided with 4 activated carbon boxes from top to bottom, and the bottom of the activated carbon box at the bottommost layer is connected with the outlet end of the pretreatment chamber.

3. An activated carbon canister for adsorbing VOCs as claimed in claim 2, wherein: the bottom of the activated carbon box adopts a silk screen to contain activated carbon particles.

4. An activated carbon canister for adsorbing VOCs as claimed in claim 2, wherein: the activated carbon box is drawer-shaped, and the opening position of the drawer is tightly connected with the activated carbon box through a fastening bolt.

5. An activated carbon canister for adsorbing VOCs as claimed in claim 1, wherein: the lower ends of the steam-water separation device and the gas distribution pipe are provided with drain valves.

6. An activated carbon canister for adsorbing VOCs as claimed in claim 1, wherein: the outlet end of the air outlet pipe is sequentially provided with a detection instrument and a channel switching device along the airflow direction, and the channel switching device is respectively connected with an exhaust pipe and a return pipe.

7. An activated carbon canister for adsorbing VOCs as claimed in claim 1, wherein: the air inlet pipe and the activated carbon box are both fixed on the support through the bracket.