Activated carbon adsorption waste gas treatment equipment, process and recovery method

Abstract

The present invention provides an activated carbon adsorption waste gas treatment device, process and recovery method, which relate to the technical field of waste gas treatment, including a support frame and an activated carbon adsorber; the activated carbon adsorber is installed on the top of the support frame, a waste gas inlet is installed on the left side of the support frame, the waste gas inlet is connected to a spray tower through a pipeline, the spray tower is connected to a temperature and humidifier through a pipeline, the temperature and humidifier is connected to an air intake duct through a pipeline on a side away from the spray tower, and the air intake duct is connected to the activated carbon adsorber; through the design of the activated carbon adsorber, condenser and layered tank structure, a pretreatment plus adsorption concentration plus steam desorption plus condensation recovery combined device can work continuously and fully automatically, multiple adsorbers are used for parallel adsorption, one adsorber is desorbed and cooled, the adsorber can be rotated and regenerated, and a centralized system steam is used for heating, so there is no need for separate preheating. The system is suitable for intermittent and continuous all-weather production enterprises.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and in particular to an activated carbon adsorption waste gas treatment device, process and recovery method. Background Art

[0002] VOCs are volatile organic compounds, which refer to organic compounds that have a high saturated vapor pressure (greater than 13.33Pa), a low boiling point, a small molecular weight, and are easily volatile at room temperature under standard conditions. This substance is one of the main pollutants in the atmosphere, and is often represented by VOC or VOCs, while total volatile organic compounds are represented by TVOC. It is worth noting that VOCs does not refer to a specific pollutant, but a general term for a class of organic compounds with similar physical and chemical properties. VOCs are a class of organic compounds with a boiling point of 50°C~260°C that are very harmful to human health and the ecological environment. How to effectively recycle and treat this type of organic waste gas can not only avoid environmental pollution, but also turn waste into treasure, reduce the investment cost of the enterprise, and achieve a win-win situation of social and economic benefits.

[0003] Currently on the market are activated carbon adsorption and honeycomb carbon adsorption. Honeycomb carbon adsorption has low efficiency, can only treat low-concentration exhaust gas, has low carbon content, and has poor sealing. The desorption (regeneration) of the equipment on the market requires the introduction of hot air containing oxygen, which has a high risk factor. Summary of the invention

[0004] In view of this, the present invention provides an activated carbon adsorption waste gas treatment equipment, process and recovery method to solve the above-mentioned activated carbon adsorption, honeycomb carbon adsorption, low honeycomb carbon adsorption efficiency, treatment of low concentration waste gas, low carbon content, poor sealing, and the need for hot air containing oxygen to be introduced during desorption (regeneration) of equipment on the market, which has a high risk factor.

[0005] The technical solution proposed in the present invention is: an activated carbon adsorption waste gas treatment equipment, comprising a support frame and an activated carbon adsorber; the activated carbon adsorber is installed on the top of the support frame, a waste gas inlet is installed on the left side of the support frame, the waste gas inlet is connected to a spray tower through a pipeline, the spray tower is connected to a temperature and humidifier through a pipeline, the temperature and humidifier is connected to an air intake duct through a pipeline on the side away from the spray tower, the air intake duct is connected to the activated carbon adsorber, the upper end of the activated carbon adsorber is connected to a chimney through an exhaust duct, a water vapor pipe is fixedly connected to the top of the activated carbon adsorber, a cooling tower is installed on the top of the support frame, the cooling tower is located between the spray tower and the activated carbon adsorber, and the cooling tower is connected to a chiller.

[0006] Furthermore, a main fan is installed at the upper end of the support frame, and the main fan is connected to the activated carbon adsorber through a cool air duct. The lower end of the activated carbon adsorber is connected to a condenser through a desorption outlet. The condenser is connected to a stratification tank through a phase separator, and the stratification tank is connected to an oil layer tank and a water layer tank through pipelines respectively.

[0007] Furthermore, an emergency discharge port is installed in the middle of the exhaust gas inlet.

[0008] Furthermore, the activated carbon adsorber includes an adsorption tank, which is fixedly connected to the support frame through a bracket, and an exhaust pipe port and a cool air port are provided at one end of the adsorption tank close to the air inlet duct, and the cool air port is located above the exhaust pipe port. An activated carbon filter layer is fixedly installed inside the adsorption tank, and a sealing component matching the activated carbon filter layer is installed inside the adsorption tank. A carbon loading tube is fixedly connected to the top of the adsorption tank, and a pressure relief valve, a carbon loading hole, a fire inlet, a steam inlet and an air outlet are respectively provided on the top of the adsorption tank, the carbon loading hole is matched with the carbon loading tube, the steam inlet is matched with a water vapor pipe, and the air outlet is matched with an exhaust duct.

[0009] Furthermore, the sealing assembly includes a main motor, which is fixedly connected to the adsorption tank, and the output end of the main motor is fixedly connected to a cam, and the middle part of the cam is rotatably sleeved with three connecting rods through a ring, and the upper ends of the three connecting rods are rotatably connected with sealing plates through fixed seats, and the lower end of the activated carbon filter layer is fixedly connected with a plurality of guide rods matching the three sealing plates, and the sealing plates matching the guide rods are slidably sleeved.

[0010] Furthermore, temperature sensors are provided on both sides of the temperature and humidity controller.

[0011] An activated carbon adsorption waste gas treatment process, comprising:

[0012] S1. The untreated waste gas first enters the spray tower through the waste gas inlet for filtration, and the particles in the waste gas are pre-filtered. Then, the waste gas from the spray tower is cooled and dehumidified and heated and humidified by the temperature and humidity regulator to reduce the water content in the waste gas and adjust the temperature at the same time, so that the temperature and humidity of the waste gas entering the activated carbon adsorber are most suitable;

[0013] S2. The waste gas that has been cooled and dehumidified and heated and humidified enters the activated carbon adsorber through the temperature and humidifier and the air intake duct. The activated carbon adsorber uses high-quality coal-based activated carbon. The organic waste gas enters the adsorption tank through the waste gas pipe port, and then is filtered through the activated carbon filter layer. At the same time, the main motor rotates intermittently to drive the cam to rotate, and then the connecting rod drives the sealing plate to move back and forth along the guide rod, thereby sealing the activated carbon filter layer in turn. The organic waste gas flows out along the unblocked activated carbon in the activated carbon filter layer in turn, and then flows into the chimney through the carbon loading hole and the exhaust duct and finally flows out. The organic waste gas is filtered through the activated carbon filter layer.

[0014] Furthermore, the temperature and humidity control device is a surface cooler, through which cooling water is introduced, and copper tubes and fins are used to perform reverse inter-wall heat exchange on the high-temperature exhaust gas, so as to reduce the high-temperature exhaust gas to a set temperature, and the high-temperature exhaust gas is used to heat the cooling water for humidity control of the subsequent spray exhaust gas, thereby achieving the purpose of energy saving, and the exhaust gas is initially cooled, and then cooled to 35°C~45°C through secondary air cooling.

[0015] Furthermore, the activated carbon filter layer uses high-quality coal-based activated carbon. The physical properties of the adsorbent adsorb VOCs organic waste gas. The columnar particle adsorbent has large specific surface area, high strength, and strong adsorption capacity, which adsorbs organic matter into the micropores of the activated carbon.

[0016] A method for recovering activated carbon adsorption waste gas treatment equipment, characterized by comprising:

[0017] L1. When the activated carbon filter layer is saturated with adsorption, it can no longer adsorb. Then, high-temperature steam is used to desorb the activated carbon filter layer. There are three adsorption tanks, namely, A adsorption tank, B adsorption tank and C adsorption tank. The pre-treated exhaust gas is sent to the A adsorption tank and the B adsorption tank by the main fan and the cooling tower for adsorption treatment. The C adsorption tank is on standby. The clean gas after adsorption is discharged from the chimney in compliance with the standards;

[0018] When L2, A adsorption tank and B adsorption tank are close to the critical saturation state of waste gas adsorption, switch to C to continue adsorption, A stops adsorption and enters the desorption stage; when A is desorbing, close the inlet and outlet air valves, open the steam valve and desorption valve, and high-temperature steam enters the interior of the adsorption tank from the top to the bottom of the water vapor pipe evenly and passes through the activated carbon filter layer. The organic waste gas flows out from the desorption outlet with the steam water, and is then collected by the condenser and the stratification tank, and then classified and recovered by the oil layer tank and the stratification tank;

[0019] After desorption of L3 and A adsorption tank is completed, it enters the cooling and regeneration stage. The steam valve and desorption valve are closed, and the pressure relief valve is opened to relieve the pressure of A adsorption tank. After the pressure relief is completed, the pressure relief valve is closed. At this time, the cool air outlet and the air outlet valve are opened, and the main fan is started to cool down the A bed;

[0020] L4. After cooling, wait for standby. When the B adsorption tank is saturated with adsorption, switch to the A adsorption tank and the C adsorption tank for adsorption, and the B adsorption tank for desorption, and the cycle continues.

[0021] The present invention provides an activated carbon adsorption waste gas treatment device, process and recovery method, which have the following beneficial effects:

[0022] When the present invention is used, the waste gas passes through the spray tower and the activated carbon adsorber through the activated carbon adsorption method, and the waste gas is effectively absorbed, which can purify the waste gas more thoroughly, that is, deep purification can be performed, especially for the purification of low-concentration waste gas, which shows greater advantages than other methods. Through the blocking component, the main motor rotates intermittently, and the blocking plate is driven in turn to block the activated carbon filter layer, so as to avoid the situation that the activated carbon filter layer is partially blocked due to uneven airflow when the activated carbon filter layer is used for a long time. The organic waste gas is filtered through the activated carbon filter layer, and the adsorption concentration plus condensation recovery process can process air volume from thousands of cubic meters to hundreds of thousands of cubic meters per hour. It has the advantages of high purification efficiency, no secondary pollution, high solvent recovery rate, low operating cost, etc. The toluene waste gas is in the adsorption tank and mixed with the activated carbon in the activated carbon filter layer. The hot steam pressurizes the inside of the adsorption tank so that the waste gas and the activated carbon are pressed and discharged-spiral heat exchanger (condensation)-40 degrees Celsius-oil-water separator (liquid state)-99% solvent recovery, and the excess gas will enter the pretreatment process again through the stratification tank with an exhaust pipe.

[0023] When the present invention is in use, through the main fan and the activated carbon adsorber, when the activated carbon filter layer is saturated with adsorption, it will no longer be able to adsorb, and then the activated carbon filter layer is desorbed by high-temperature water vapor. There are three adsorption tanks, namely, adsorption tank A, adsorption tank B and adsorption tank C. The pre-treated exhaust gas is sent to adsorption tank A and adsorption tank B by the main fan and the cooling tower for adsorption treatment, and adsorption tank C is on standby. The clean gas after adsorption is discharged from the chimney in compliance with the standards. When adsorption tank A and adsorption tank B are close to the critical saturation state, adsorption tank C is switched to continue adsorption, and adsorption tank A stops adsorption and enters the desorption stage; when adsorption tank A is desorbing, the inlet and outlet air valves are closed, the steam valve and the desorption valve are opened, and high-temperature steam enters the adsorption tank evenly from the top to the bottom of the water vapor pipe. The interior of the attached tank passes through the activated carbon filter layer, and the organic waste gas flows out from the desorption outlet with the steam water, and is then collected by the condenser and the stratification tank, and then classified and recovered through the oil layer tank and the stratification tank. After the desorption of adsorption tank A is completed, it enters the cooling and regeneration stage, the steam valve and the desorption valve are closed, and the pressure relief valve is opened to relieve the pressure on adsorption tank A. After the pressure relief is completed, the pressure relief valve is closed. At this time, the cool air port and the air outlet valve are opened, and the main fan is started at the same time to cool down adsorption tank A. After the cooling is completed, it waits for standby. After the adsorption of adsorption tank B is saturated, switch adsorption tank A and adsorption tank C for adsorption, and adsorption tank B for desorption, and the cycle continues. The equipment adopts multi-gas path continuous operation and sets multiple adsorption beds for alternate use to adapt to enterprises with 24-hour uninterrupted production. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0025] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0026] In the attached picture:

[0027] Figure 1 The schematic diagram of the structure of an activated carbon adsorption waste gas treatment device of the present invention is shown;

[0028] Figure 2 The internal structure schematic diagram of the activated carbon adsorber of the present invention is shown;

[0029] Figure 3 The schematic diagram of the structure of the activated carbon adsorber of the present invention is shown;

[0030] Figure 4 A schematic diagram of the top view of the activated carbon adsorber implemented in the present invention is shown;

[0031] Figure 5 A schematic structural diagram of the plugging assembly of the present invention is shown;

[0032] Figure 6 The present invention is shown Figure 1 Schematic diagram of the structure at D;

[0033] Figure 7 The schematic diagram of the structure of activated carbon adsorption recovery of the present invention is shown;

[0034] Figure 8 The schematic structural diagram of the activated carbon adsorption process of the present invention is shown.

[0035] Reference numerals list

[0036] 1. Support frame; 2. Exhaust gas inlet; 3. Emergency discharge port; 4. Spray tower; 5. Temperature and humidity controller; 51. Temperature sensor; 6. Cooling tower; 7. Air intake duct; 8. Activated carbon adsorber; 801. Adsorption tank; 802. Exhaust gas pipe outlet; 803. Cool air outlet; 804. Activated carbon filter layer; 805. Carbon tube; 806. Blocking assembly; 8061. Main motor; 8062. Cam; 8063. Connecting rod; 8064 , blocking plate; 8065, guide rod; 807, bracket; 808, pressure relief valve; 809, carbon loading hole; 810, fire inlet; 811, steam inlet; 812, air outlet; 9, exhaust duct; 10, chimney; 11, chiller; 12, steam pipe; 13, cool air duct; 14, main fan; 15, condenser; 16, phase separator; 17, stratification tank; 18, oil layer tank; 19, water layer tank; 20, desorption outlet. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Please refer to Figures 1 to 6 , Embodiment 1:

[0039] The present invention proposes an activated carbon adsorption waste gas treatment device, comprising a support frame 1 and an activated carbon adsorber 8; the activated carbon adsorber 8 is installed on the top of the support frame 1, and an exhaust gas inlet 2 is installed on the left side of the support frame 1, the exhaust gas inlet 2 is connected to a spray tower 4 through a pipeline, the spray tower 4 is connected to a temperature and humidity controller 5 through a pipeline, the temperature and humidity controller 5 is connected to an air intake duct 7 through a pipeline on the side away from the spray tower 4, the air intake duct 7 is connected to the activated carbon adsorber 8, the upper end of the activated carbon adsorber 8 is connected to a chimney 10 through an exhaust duct 9, the top of the activated carbon adsorber 8 is fixedly connected to a water vapor pipe 12, a cooling tower 6 is installed on the top of the support frame 1, the cooling tower 6 is located between the spray tower 4 and the activated carbon adsorber 8, and the cooling tower 6 is connected to a chiller 11.

[0040] Preferably, a main fan 14 is installed at the upper end of the support frame 1, and the main fan 14 is connected to the activated carbon adsorber 8 through a cool air duct 13. The lower end of the activated carbon adsorber 8 is connected to a condenser 15 through a desorption outlet 20. The condenser 15 is connected to a stratification tank 17 through a phase separator 16. The stratification tank 17 is connected to an oil layer tank 18 and a water layer tank 19 through pipelines, respectively.

[0041] Preferably, an emergency discharge port 3 is installed in the middle of the exhaust gas inlet 2 .

[0042] Preferably, the activated carbon adsorber 8 comprises an adsorption tank 801, the adsorption tank 801 is fixedly connected to the support frame 1 through a bracket 807, an end of the adsorption tank 801 close to the air inlet duct 7 is provided with an exhaust pipe opening 802 and a cool air opening 803, the cool air opening 803 is located above the exhaust pipe opening 802, an activated carbon filter layer 804 is fixedly installed inside the adsorption tank 801, a plugging component 806 matching the activated carbon filter layer 804 is installed inside the adsorption tank 801, and the adsorption tank 8 The top of the adsorption tank 801 is fixedly connected with a carbon loading tube 805. The top of the adsorption tank 801 is respectively provided with a pressure relief valve 808, a carbon loading hole 809, a fire inlet 810, a steam inlet 811 and an air outlet 812. The carbon loading hole 809 is matched with the carbon loading tube 805, the steam inlet 811 is matched with the water vapor pipe 12, and the air outlet 812 is matched with the exhaust air duct 9. The activated carbon filter layer 804 adopts coal columnar granular activated carbon for filtration and adsorption, and the CTC can reach more than 70%, and the adsorption efficiency can reach 99 % or more, hot steam evenly enters the adsorption tank 801 to prevent the internal carbon particles from spreading to both sides during the air intake process. There are three adsorption tanks 801, which can be set as A adsorption tank, B adsorption tank, and C adsorption tank. The important indicator parameter of activated carbon adsorption of waste gas is the carbon tetrachloride (CTC) adsorption value. The carbon tetrachloride adsorption value is a ruler used to measure the quality of activated carbon for easily adsorbed gases. The larger the value, the stronger the adsorption capacity. The activated carbon used for activated carbon adsorption and recovery mostly uses coal-based activated carbon with well-developed micropores. CTC is not less than 70%, strength is not less than 90%, moisture is less than 5%, and ash is less than 15%.

[0043] Preferably, the sealing component 806 includes a main motor 8061, which is fixedly connected to the adsorption tank 801, and the output end of the main motor 8061 is fixedly connected to a cam 8062, and the middle part of the cam 8062 is rotatably sleeved with three connecting rods 8063 through a sleeve, and the upper ends of the three connecting rods 8063 are rotatably connected with a sealing plate 8064 through a fixed seat, and the lower end of the activated carbon filter layer 804 is fixedly connected with a plurality of guide rods 8065 matching the three sealing plates 8064, and the sealing plates 8064 matching the guide rods 8065 are slidably sleeved.

[0044] Preferably, both sides of the temperature and humidity control device 5 are provided with temperature sensors 51. The temperature and humidity control device 5 can be a two-stage surface cooler, into which cooling water is introduced, and copper tubes and fins are used to reversely exchange heat between high-temperature exhaust gas and the high-temperature exhaust gas to reduce the high-temperature exhaust gas to a set temperature. Cold water and hot water are respectively introduced into the two-stage surface cooler to cool and dehumidify the exhaust gas from the spray tower 4 and to increase the temperature and humidity, thereby reducing the water content in the exhaust gas and adjusting the temperature at the same time, so that the exhaust gas temperature and humidity entering the activated carbon adsorber are most suitable (the condenser is first cooled by 25°C, and then heated to control the humidity). The exhaust gas temperature is controlled below 40°C, and the humidity is 70°C for subsequent adsorption - activated carbon adsorption canister (80 carbon, mainly purification, 1200 minutes) (intake concentration 4000 mg / cubic), exhaust concentration (30 mg / cubic).

[0045] On the basis of the first embodiment, the second embodiment, as Figures 7 and 8 As shown;

[0046] An activated carbon adsorption waste gas treatment process, comprising:

[0047] S1: The untreated waste gas first enters the spray tower 4 through the waste gas inlet 2 for filtration, and the particles in the waste gas are pre-filtered, and then the waste gas from the spray tower 4 is cooled and dehumidified and heated and humidified by the temperature and humidity control device 5, so as to reduce the water content in the waste gas and adjust the temperature at the same time, so that the temperature and humidity of the waste gas entering the activated carbon adsorber are most suitable;

[0048] S2. The waste gas that has been cooled and dehumidified and heated and humidified enters the interior of the activated carbon adsorber 8 through the temperature and humidity regulator 5 and the air inlet duct 7. The activated carbon adsorber 8 uses high-quality coal-based activated carbon. The organic waste gas enters the interior of the adsorption tank 801 through the waste gas pipe port 802, and then passes through the activated carbon filter layer 804 to filter the organic waste gas. At the same time, the main motor 8061 rotates intermittently to drive the cam 8062 to rotate, and then the connecting rod 8063 drives the blocking plate 8064 to move up and down along the guide rod 8065, and the activated carbon filter layer 804 is blocked in turn. The organic waste gas flows out along the unblocked activated carbon in the activated carbon filter layer 804 in turn, and then flows into the chimney through the carbon hole 809 and the exhaust duct 9. 10 Finally it flows out, and the excess gas will re-enter the pre-treatment process through the exhaust pipe of the stratification tank. The organic waste gas is filtered through the activated carbon filter layer 804. The adsorption concentration plus condensation recovery process can process air volume from thousands of cubic meters to hundreds of thousands of cubic meters per hour. It has the advantages of high purification efficiency, no secondary pollution, high solvent recovery rate, and low operating cost. The toluene waste gas is in the adsorption tank 801 and is mixed with the activated carbon of the activated carbon filter layer 804. Hot steam pressurizes the interior of the adsorption tank 801 to pressurize the waste gas and the activated carbon and discharge it - spiral heat exchanger (condensation) - 40 degrees Celsius - oil-water separator (liquid state) - 99% solvent recovery, and the excess gas will re-enter the pre-treatment process through the exhaust pipe of the stratification tank.

[0049] Preferably, the temperature and humidity control device 5 is a surface cooler, through which cooling water is introduced, and copper tubes and fins are used to perform reverse inter-wall heat exchange on the high-temperature exhaust gas to reduce the high-temperature exhaust gas to a set temperature. The high-temperature exhaust gas is used to heat the cooling water for humidity control of the exhaust gas in the rear spraying stage to achieve the purpose of energy saving, and the exhaust gas is initially cooled, and then cooled to 35°C~45°C through secondary air cooling. Thermometer negative pressure detection devices and cleaning holes are set before and after, which are convenient for checking the cleanliness of the air cooler and for cleaning without disassembling it for cleaning.

[0050] Preferably, the activated carbon filter layer 804 uses high-quality coal-based activated carbon. The physical properties of the adsorbent adsorb VOCs organic waste gas. The columnar particle adsorbent has a large specific surface area, high strength, and strong adsorption capacity. It adsorbs organic matter into the micropores of the activated carbon. When the adsorbent is saturated with adsorption, it can no longer adsorb. Then, high-temperature water vapor is used to desorb the adsorbent. When the organic matter in the pores of the adsorbent is exposed to high temperature, its activity and kinetic energy increase and it will automatically separate from the activated carbon material, regenerating the adsorbent. The desorbed organic matter is mixed with high-temperature water vapor and sent to the condenser from top to bottom with the air flow for cooling.

[0051] On the basis of the first embodiment, the third embodiment, as Figures 7 and 8 As shown;

[0052] A method for recovering activated carbon adsorption waste gas treatment equipment, characterized by comprising:

[0053] L1: When the activated carbon filter layer 804 is saturated with adsorption, it can no longer adsorb. Then, high-temperature steam is used to desorb the activated carbon filter layer 804. The adsorption tank 801 has three adsorption tanks, namely, adsorption tank A, adsorption tank B, and adsorption tank C. The pre-treated exhaust gas is sent to adsorption tank A and adsorption tank B by the main fan 14 and the cooling tower 6 for adsorption treatment. The adsorption tank C is on standby. The clean gas after adsorption is discharged through the chimney 10 in compliance with the standards;

[0054] L2: When the adsorption of waste gas by adsorption tank A and adsorption tank B approaches the critical saturation state, adsorption tank C is switched to continue adsorption, and adsorption tank A stops adsorption and enters the desorption stage; when adsorption tank A is desorbing, the inlet and outlet air valves are closed, the steam valve and desorption valve are opened, and high-temperature steam enters the interior of adsorption tank 801 from the top to the bottom of the water vapor pipe 12 and passes through the activated carbon filter layer 804. The organic waste gas flows out from the desorption outlet 20 along with the steam water, and is then collected by the condenser 15 and the stratification tank 17, and then classified and recovered by the oil layer tank 18 and the stratification tank 17;

[0055] After desorption of L3 and A adsorption tank is completed, it enters the cooling and regeneration stage, the steam valve and the desorption valve are closed, and the pressure relief valve 808 is opened to relieve the pressure of A adsorption tank. After the pressure relief is completed, the pressure relief valve 808 is closed, and the cool air outlet 803 and the air outlet valve are opened, and the main fan 14 is started to cool down the A adsorption tank;

[0056] L4. After cooling down, wait for standby. When the B adsorption tank is saturated with adsorption, switch to the A adsorption tank and the C adsorption tank for adsorption, and the B adsorption tank for desorption, and the cycle continues. The equipment adopts multi-gas path continuous operation and sets up multiple adsorption beds for alternate use, which is suitable for enterprises with 24-hour uninterrupted production.

[0057] This application actually installs safely:

[0058] 1. The wind pressure of the main fan 14 is automatically controlled by frequency conversion according to the front-end pressure transmitter to ensure smooth air flow. The fan selection is strictly calculated according to the system wind pressure and suitable air volume. A high-performance high-pressure fan is selected with low speed, good working performance, low energy consumption, low noise and easy maintenance. Stainless steel corrugated vibration damping pipes are set before and after the fan, which have no leakage, good buffering performance and long service life. A high-performance sealing butterfly valve is set at the fan outlet to ensure that there is no exhaust gas backflow to other unstarted machines. Each fan is equipped with frequency conversion adjustment, which is more energy-saving and more precise in controlling the air volume.

[0059] 2. Add LEL concentration alarm at the front end of the collection duct to ensure air intake safety:

[0060] 3. Control the emergency discharge valve to open according to the alarm requirements and shut off the exhaust gas inlet valve at the same time;

[0061] 4. The activated carbon adsorber 8 is provided with temperature and pressure sensors. When the set values ​​are reached, the system automatically enters the corresponding safety mode.

[0062] 5. In the event of a power outage, the UPS continues to supply power to the PLC, using the compressed air in the storage tank to control the opening of the emergency discharge valve and perform safety protection actions.

[0063] 6. Each automatic valve has a position signal feedback switch to detect whether the actual movement of the valve is in place.

[0064] 7. The system is equipped with safety protection devices such as overload protection, line fault protection and misoperation protection.

[0065] In this article, there are a few points to note:

[0066] 1. The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention, and other structures may refer to the usual designs.

[0067] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0068] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An activated carbon adsorption waste gas treatment device, comprising a support frame (1) and an activated carbon adsorber (8); characterized in that: The activated carbon adsorber (8) is mounted on the top of the support frame (1); an exhaust gas inlet (2) is mounted on the left side of the support frame (1); the exhaust gas inlet (2) is connected to a spray tower (4) via a pipeline; the spray tower (4) is connected to a temperature and humidity controller (5) via a pipeline; a side of the temperature and humidity controller (5) away from the spray tower (4) is connected to an air intake duct (7) via a pipeline; the air intake duct (7) is connected to the activated carbon adsorber (8); the upper end of the activated carbon adsorber (8) is connected to a chimney (10) via an exhaust duct (9); a water vapor pipe (12) is fixedly connected to the top of the activated carbon adsorber (8); a cooling tower (6) is mounted on the top of the support frame (1); the cooling tower (6) is located between the spray tower (4) and the activated carbon adsorber (8); the cooling tower (6) is connected to a chiller (11); A main fan (14) is installed at the upper end of the support frame (1), and the main fan (14) is connected to the activated carbon adsorber (8) through a cool air pipe (13). The lower end of the activated carbon adsorber (8) is connected to a condenser (15) through a desorption outlet (20). The condenser (15) is connected to a stratification tank (17) through a phase separator (16). The stratification tank (17) is connected to an oil layer tank (18) and a water layer tank (19) through pipelines.

2. The activated carbon adsorption waste gas treatment equipment according to claim 1 is characterized in that: An emergency discharge port (3) is installed in the middle of the exhaust gas inlet (2).

3. The activated carbon adsorption waste gas treatment equipment according to claim 1, characterized in that: The activated carbon adsorber (8) comprises an adsorption tank (801), the adsorption tank (801) being fixedly connected to the support frame (1) via a bracket (807), an end of the adsorption tank (801) close to the air inlet duct (7) being provided with an exhaust pipe opening (802) and a cool air opening (803), the cool air opening (803) being located above the exhaust pipe opening (802), an activated carbon filter layer (804) being fixedly installed inside the adsorption tank (801), and a filter element (805) connected to the activated carbon filter layer (806) being installed inside the adsorption tank (801). 04) a plugging assembly (806) matched with the adsorption tank (801), the top of the adsorption tank (801) is fixedly connected with a carbon loading tube (805), the top of the adsorption tank (801) is respectively provided with a pressure relief valve (808), a carbon loading hole (809), a fire inlet (810), a steam inlet (811) and an air outlet (812), the carbon loading hole (809) is matched with the carbon loading tube (805), the steam inlet (811) is matched with the water vapor pipe (12), and the air outlet (812) is matched with the exhaust air duct (9).

4. The activated carbon adsorption waste gas treatment equipment according to claim 3 is characterized in that: The plugging component (806) comprises a main motor (8061), the main motor (8061) is fixedly connected to the adsorption tank (801), the output end of the main motor (8061) is fixedly connected to a cam (8062), the middle part of the cam (8062) is rotatably sleeved with three connecting rods (8063) via a sleeve ring, the upper ends of the three connecting rods (8063) are rotatably connected to a plugging plate (8064) via a fixed seat, the lower end of the activated carbon filter layer (804) is fixedly connected to a plurality of guide rods (8065) ​​matched with the three plugging plates (8064), and the plugging plates (8064) matched with the guide rods (8065) ​​are slidably sleeved.

5. The activated carbon adsorption waste gas treatment equipment according to claim 1, characterized in that: Temperature sensors (51) are provided on both sides of the temperature and humidity controller (5).

6. A process for treating waste gas by activated carbon adsorption according to any one of claims 1 to 5, characterized in that: include: S1: The untreated waste gas first enters the spray tower (4) through the waste gas inlet (2) for filtration, and the particles in the waste gas are pre-filtered. Then, the waste gas from the spray tower (4) is cooled and dehumidified and heated and humidified by the temperature and humidity control device (5), so as to reduce the water content in the waste gas and adjust the temperature at the same time, so that the temperature and humidity of the waste gas entering the activated carbon adsorber are most suitable; S2. The waste gas that has undergone cooling and dehumidification and heating and humidification enters the interior of the activated carbon adsorber (8) through the temperature and humidity controller (5) and the air inlet duct (7). The activated carbon adsorber (8) uses high-quality coal-based activated carbon. The organic waste gas enters the interior of the adsorption tank (801) through the waste gas pipe opening (802), and then is filtered by the activated carbon filter layer (804). At the same time, the main motor (8061) rotates intermittently to drive the cam (8062) to rotate, and then the connecting rod (8063) drives the blocking plate (8064) to move up and down along the guide rod (8065) ​​to achieve blocking of the activated carbon filter layer (804) in turn. The organic waste gas flows out along the unblocked activated carbon of the activated carbon filter layer (804) in turn, and then flows into the chimney (10) through the carbon loading hole (809) and the exhaust duct (9) and finally flows out. The organic waste gas is filtered by the activated carbon filter layer (804).

7. The process for treating waste gas by activated carbon adsorption according to claim 6 is characterized in that: The temperature and humidity control device (5) is a surface cooler, into which cooling water is introduced, and the high-temperature exhaust gas is subjected to reverse inter-wall heat exchange by using copper tubes and fins, so as to reduce the high-temperature exhaust gas to a set temperature. The high-temperature exhaust gas is used to heat the cooling water for the subsequent spray exhaust gas humidity control, thereby achieving the purpose of energy saving, and the exhaust gas is initially cooled, and then cooled to 35°C~45°C by secondary air cooling.

8. The process for treating waste gas by activated carbon adsorption according to claim 6 is characterized in that: The activated carbon filter layer (804) uses high-quality coal-based activated carbon. The physical properties of the adsorbent adsorb VOCs organic waste gas. The columnar particle adsorbent has large specific surface area, high strength, and strong adsorption capacity, which adsorbs organic matter into the micropores of the activated carbon.

9. The recovery method for the process of activated carbon adsorption waste gas treatment equipment according to any one of claims 6 to 8, characterized in that: include: L1: When the activated carbon filter layer (804) is saturated with adsorption and can no longer perform adsorption, high-temperature water vapor is used to desorb the activated carbon filter layer (804). The adsorption tank (801) has three adsorption tanks, namely, adsorption tank A, adsorption tank B, and adsorption tank C. The pre-treated exhaust gas is sent to adsorption tank A and adsorption tank B by the main fan (14) and the cooling tower (6) for adsorption treatment. The adsorption tank C is kept on standby. The clean gas after adsorption is discharged through the chimney (10) in compliance with the standards. L2: When the adsorption of waste gas by adsorption tank A and adsorption tank B approaches the critical saturation state, adsorption tank C is switched to continue adsorption, and adsorption tank A stops adsorption and enters the desorption stage; when adsorption tank A is desorbing, the inlet and outlet air valves are closed, the steam valve and the desorption valve are opened, and high-temperature steam enters the adsorption tank (801) from the top to the bottom through the water vapor pipe (12) and passes through the activated carbon filter layer (804). The organic waste gas flows out from the desorption outlet (20) along with the steam water, and is then collected by the condenser (15) and the stratification tank (17), and then classified and recovered by the oil layer tank (18) and the stratification tank (17); After desorption of L3 and A adsorption tank is completed, the cooling and regeneration stage is entered, the steam valve and the desorption valve are closed, and the pressure relief valve (808) is opened to relieve the pressure of A adsorption tank. After the pressure relief is completed, the pressure relief valve (808) is closed, and then the cool air outlet (803) and the air outlet valve are opened, and the main fan (14) is started at the same time to cool down the A adsorption tank; L4. After cooling, wait for standby. When the B adsorption tank is saturated with adsorption, switch to the A adsorption tank and the C adsorption tank for adsorption, and the B adsorption tank for desorption, and the cycle continues.

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