A steam desorption device based on waste gas resin adsorption

Abstract

This utility model discloses a steam desorption device for waste gas resin adsorption, including a supporting base plate, an adsorption tower fixedly connected to the supporting base plate, a resin adsorption bed installed inside the adsorption tower, a waste gas pretreatment mechanism between the supporting base plate and the adsorption tower, a waste gas purification mechanism between the supporting base plate and the adsorption tower, a steam desorption mechanism between the supporting base plate and the adsorption tower, and a cooling mechanism between the supporting base plate and the adsorption tower. This utility model ensures efficient VOCs capture by the adsorption resin bed through multi-stage pretreatment including filtration, cooling, and dehumidification. Combined with steam desorption and condensation separation, it achieves VOCs desorption and recovery. During the desorption stage, low-pressure saturated steam breaks the adsorption equilibrium, driving VOCs release. Finally, condensation and phase change separation achieve the stratified recovery of VOCs and water, avoiding secondary pollution and realizing the resource utilization of organic matter.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment technology, and in particular relates to a steam desorption device for waste gas resin adsorption. Background Technology

[0002] In the process of waste gas treatment, the traditional method may be to use high-temperature gas desorption and then directly incinerate the high-concentration VOCs gas. This not only wastes recyclable organic resources, but also poses the problem of secondary pollution. Furthermore, when switching to the desorption process, the adsorption tower may contain a mixture of air and VOCs, forming an explosive environment. The traditional method of directly introducing heat medium poses safety hazards. At the same time, incomplete desorption will affect the adsorption efficiency of the next round. Therefore, a steam desorption device based on waste gas resin adsorption is proposed. Utility Model Content

[0003] The purpose of this invention is to provide a steam desorption device for waste gas resin adsorption to solve the problems mentioned in the background art.

[0004] A steam desorption device for waste gas resin adsorption includes a supporting base plate, an adsorption tower fixedly connected to the supporting base plate, a resin adsorption bed installed inside the adsorption tower, a waste gas pretreatment mechanism between the supporting base plate and the adsorption tower, a waste gas purification mechanism between the supporting base plate and the adsorption tower, a steam desorption mechanism between the supporting base plate and the adsorption tower, and a cooling mechanism between the supporting base plate and the adsorption tower.

[0005] Furthermore, the waste gas pretreatment mechanism includes a first fixed frame, an induced draft fan, a first air pipe, a second air pipe, a waste gas filter, a third air pipe, a cooler, a fourth air pipe, a dehumidifier, a reinforcing frame, a fifth air pipe, and a first electric valve. The first fixed frame is fixedly connected to the support base plate, the induced draft fan is fixedly installed on the first fixed frame, the first air pipe is connected to the induced draft fan, the waste gas filter is fixedly installed on the support base plate, the second air pipe connects the induced draft fan and the waste gas filter, the cooler is fixedly installed on the support base plate, the third air pipe connects the waste gas filter and the cooler, the dehumidifier is fixedly installed on the support base plate, the fourth air pipe connects the cooler and the dehumidifier, the reinforcing frame is fixedly connected to the adsorption tower, the fifth air pipe connects the dehumidifier and the adsorption tower, the fifth air pipe is connected to the reinforcing frame, and the first electric valve is installed on the fifth air pipe.

[0006] Furthermore, the exhaust gas purification mechanism includes a second fixed frame, a first exhaust fan, an exhaust gas purifier, a first guide pipe, a second guide pipe, and a second electric valve. The second fixed frame is fixedly connected to the support base plate, the first exhaust fan is fixedly installed on the second fixed frame, the exhaust gas purifier is fixedly installed on the support base plate, the first guide pipe connects the first exhaust fan and the exhaust gas purifier, the second guide pipe connects the first exhaust fan and the adsorption tower, and the second electric valve is installed on the second guide pipe.

[0007] Furthermore, the steam desorption mechanism includes a steam generator, a third fixed frame, a second ejector, a first conveying pipe, a second conveying pipe, a directional hood, and a third electric valve. The steam generator is fixedly installed on the support base plate, the third fixed frame is fixedly connected to the adsorption tower, the second ejector is fixedly installed on the third fixed frame, the first conveying pipe is connected between the second ejector and the steam generator, the second conveying pipe is connected between the second ejector and the adsorption tower, the directional hood is connected to the second conveying pipe, and the third electric valve is installed on the first conveying pipe.

[0008] Furthermore, the cooling mechanism includes a fourth fixed frame, a third vacuum pump, a first flow pipe, an arc-shaped shroud, a second flow pipe, a condenser, a third flow pipe, and a phase change separator. The fourth fixed frame is fixedly connected to the support base plate, and the third vacuum pump is fixedly installed on the fourth fixed frame. The first flow pipe is connected between the third vacuum pump and the adsorption tower, and the arc-shaped shroud is connected to the first flow pipe. The condenser is fixedly installed on the support base plate, and the second flow pipe is connected between the condenser and the third vacuum pump. The phase change separator is fixedly installed on the support base plate, and the third flow pipe is connected between the phase change separator and the condenser.

[0009] Furthermore, the condenser uses a shell-and-tube or plate heat exchanger.

[0010] Furthermore, the resin adsorption bed is made of polystyrene or polyacrylate-based resin.

[0011] The beneficial effects of this utility model are:

[0012] 1. This utility model ensures efficient capture of VOCs by the adsorption resin bed through multi-stage pretreatment such as filtration, cooling, and dehumidification. It also achieves VOCs desorption and recovery by combining steam desorption and condensation separation. In the desorption stage, low-pressure saturated steam is used to break the adsorption equilibrium and drive the release of VOCs. Finally, VOCs and water are recovered in layers through condensation and phase change separation, avoiding secondary pollution and realizing the resource utilization of organic matter.

[0013] 2. This utility model effectively removes and drives away residual waste gas in the tower by introducing low-pressure saturated steam from the top to sweep the resin bed during the steam desorption process, thereby reducing the risk of combustible gas accumulation. At the same time, the steam serves as both a heat medium to provide the energy required for desorption and a carrier gas to safely transport high-concentration VOCs to the condensation and recovery unit, thereby improving safety and operational reliability. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the steam desorption device for waste gas resin adsorption based on this utility model;

[0015] Figure 2 This is a side view of the three-dimensional structure of the first fixing frame;

[0016] Figure 3 This is a side view of the three-dimensional structure of the second fixing frame;

[0017] Figure 4 This is a cross-sectional three-dimensional structural diagram of the adsorption tower;

[0018] Figure 5 This is a side view of the three-dimensional structure of the fourth fixing frame.

[0019] In the diagram, 1-supporting base plate, 2-adsorption tower, 3-resin adsorption bed, 4-exhaust gas pretreatment mechanism, 41-first fixed frame, 42-induced draft fan, 43-first air pipe, 44-second air pipe, 45-exhaust gas filter, 46-third air pipe, 47-cooler, 48-fourth air pipe, 49-dehumidifier, 410-reinforcing frame, 411-fifth air pipe, 412-first electric valve, 5-exhaust gas purification mechanism, 51-second fixed frame, 52-first exhaust fan, 53-exhaust gas purifier, 54-... 55-First guide pipe, 56-Second guide pipe, 57-Second electric valve, 6-Steam desorption mechanism, 61-Steam generator, 62-Third fixed frame, 63-Second vacuum pump, 64-First delivery pipe, 65-Second delivery pipe, 66-Directional hood, 67-Third electric valve, 7-Cooling mechanism, 71-Fourth fixed frame, 72-Third vacuum pump, 73-First flow pipe, 74-Arc hood, 75-Second flow pipe, 76-Condenser, 77-Third flow pipe, 78-Phase change separator. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] like Figures 1 to 5The present invention discloses a vapor desorption device for waste gas based on resin adsorption, which includes a supporting base plate 1, an adsorption tower 2 fixedly connected to the supporting base plate 1, a resin adsorption bed 3 installed inside the adsorption tower 2, the resin adsorption bed 3 being used to adsorb organic molecules in the waste gas, a waste gas pretreatment mechanism 4 being provided between the supporting base plate 1 and the adsorption tower 2, a waste gas purification mechanism 5 being provided between the supporting base plate 1 and the adsorption tower 2, a vapor desorption mechanism 6 being provided between the supporting base plate 1 and the adsorption tower 2, and a cooling mechanism 7 being provided between the supporting base plate 1 and the adsorption tower 2.

[0022] The exhaust gas pretreatment mechanism 4 includes a first fixed frame 41, an induced draft fan 42, a first air pipe 43, a second air pipe 44, an exhaust gas filter 45, a third air pipe 46, a cooler 47, a fourth air pipe 48, a dehumidifier 49, a reinforcing frame 410, a fifth air pipe 411, and a first electric valve 412. The first fixed frame 41 is fixedly connected to the supporting base plate 1, and the induced draft fan 42 is fixedly installed on the first fixed frame 41. The induced draft fan 42 is used to guide the exhaust gas, and the first air pipe 43 is connected to the induced draft fan 42. The exhaust gas filter 45 is fixedly installed on the supporting base plate 1, and the exhaust gas filter 45 is used to filter particulate matter in the exhaust gas. The induced draft fan 42 and the exhaust gas... A second air pipe 44 is connected between the air filters 45. A cooler 47 is fixedly installed on the support base plate 1. The cooler 47 is used to cool the exhaust gas. A third air pipe 46 is connected between the exhaust gas filter 45 and the cooler 47. A dehumidifier 49 is fixedly installed on the support base plate 1. The dehumidifier 49 is used to dehumidify the exhaust gas. A fourth air pipe 48 is connected between the cooler 47 and the dehumidifier 49. A reinforcing frame 410 is fixedly connected to the adsorption tower 2. A fifth air pipe 411 is connected between the dehumidifier 49 and the adsorption tower 2. The fifth air pipe 411 is connected to the reinforcing frame 410. A first electric valve 412 is installed on the fifth air pipe 411.

[0023] The exhaust gas purification mechanism 5 includes a second fixed frame 51, a first exhaust fan 52, an exhaust gas purifier 53, a first guide pipe 54, a second guide pipe 55, and a second electric valve 56. The second fixed frame 51 is fixedly connected to the support base plate 1, and the first exhaust fan 52 is fixedly installed on the second fixed frame 51. The first exhaust fan 52 is used to remove the treated exhaust gas. The exhaust gas purifier 53 is fixedly installed on the support base plate 1 and is used to purify the exhaust gas. The first guide pipe 54 connects the first exhaust fan 52 and the exhaust gas purifier 53. The second guide pipe 55 connects the first exhaust fan 52 and the adsorption tower 2. The second electric valve 56 is installed on the second guide pipe 55.

[0024] The steam desorption mechanism 6 includes a steam generator 61, a third fixed frame 62, a second ejector 63, a first conveying pipe 64, a second conveying pipe 65, a directional hood 66, and a third electric valve 67. The steam generator 61 is fixedly installed on the support base plate 1. The third fixed frame 62 is fixedly connected to the adsorption tower 2. The second ejector 63 is fixedly installed on the third fixed frame 62. The second ejector 63 is used to convey steam. The first conveying pipe 64 is connected between the second ejector 63 and the steam generator 61. The second conveying pipe 65 is connected between the second ejector 63 and the adsorption tower 2. The directional hood 66 is connected to the second conveying pipe 65. The third electric valve 67 is installed on the first conveying pipe 64.

[0025] The cooling mechanism 7 includes a fourth fixed frame 71, a third vacuum pump 72, a first flow pipe 73, an arc-shaped cover 74, a second flow pipe 75, a condenser 76, a third flow pipe 77, and a phase change separator 78. The fourth fixed frame 71 is fixedly connected to the support base plate 1, and the third vacuum pump 72 is fixedly installed on the fourth fixed frame 71. The third vacuum pump 72 is used to extract the mixed gas. The first flow pipe 73 is connected between the third vacuum pump 72 and the adsorption tower 2. The arc-shaped cover 74 is connected to the first flow pipe 73. The condenser 76 is fixedly installed on the support base plate 1. The condenser 76 is used to cool the high-temperature mixed gas. The second flow pipe 75 is connected between the condenser 76 and the third vacuum pump 72. The phase change separator 78 is fixedly installed on the support base plate 1, and the third flow pipe 77 is connected between the phase change separator 78 and the condenser 76.

[0026] The condenser 76 uses a shell-and-tube or plate heat exchanger.

[0027] The resin adsorption bed 3 is made of polystyrene or polyacrylate-based resin.

[0028] The steam generator 61 includes a steam generator body, a water pump for supplying water to it, a pressure controller for controlling its internal pressure, and a safety valve for preventing overpressure. The steam generator body is preferably electrically heated, and it heats water into saturated steam at 105-120°C through an internal electric heating tube.

[0029] The working principle of this utility model is as follows: After connecting the first gas pipe to the waste gas storage area, the induced draft fan is started, allowing the waste gas to enter the waste gas filter through the first and second gas pipes. The waste gas filter removes dust and particulate matter from the waste gas, preventing blockage of the resin pores. The filtered waste gas then enters the cooler through the third gas pipe, which cools the waste gas to the optimal working temperature of the adsorption resin. The cooled waste gas then enters the dehumidifier through the fourth gas pipe, which dehumidifies the waste gas. Excessive humidity will compete with VOCs for adsorption sites, reducing adsorption efficiency. After the first electric valve opens the fifth gas pipe, the dehumidified waste gas enters the adsorption tower through the fifth gas pipe and passes through the resin adsorption bed. The volatile organic compound molecules in the waste gas are physically adsorbed and retained in the pores by the resin's huge specific surface area and pore structure, thereby achieving VOCs capture.

[0030] After the exhaust gas is treated, the second electric valve is controlled to open the second guide pipe. The first air extractor will then extract the treated exhaust gas, allowing it to enter the exhaust gas purifier through the second and first guide pipes. The exhaust gas purifier will then purify the exhaust gas, further improving its performance and ensuring it meets emission standards.

[0031] Once the resin adsorption bed reaches saturation, the first electric valve closes the fifth gas pipe, and the third electric valve opens the first delivery pipe. Then, the second pump extracts the low-pressure saturated steam generated by the steam generator, allowing it to enter the adsorption tower through the first and second delivery pipes and the directional hood. This low-pressure saturated steam sweeps downwards across the resin adsorption bed. The steam entering from the top helps to displace and expel residual waste gas from the tower, improving safety. The large amount of heat energy carried by the steam is transferred to the resin and the adsorbed VOCs, significantly increasing the temperature and reducing the adsorption capacity of VOCs on the resin, breaking the original adsorption equilibrium. VOC molecules gain energy, break free from the resin's adsorption force, and are released from the solid phase, transforming into a gaseous state. The continuously flowing steam acts as a carrier gas, causing the desorbed high-concentration VOCs gas to flow to the bottom of the adsorption tower, forming a mixture of steam and VOCs.

[0032] The third extraction unit extracts the mixed gas, allowing it to pass through the arc-shaped shroud, the first flow pipe, and the second flow pipe into the condenser. The high-temperature mixed gas is cooled by cooling water upon entering the condenser. The cooled mixed gas then passes through the third flow pipe into the phase change separator, where water vapor and most of the VOCs vapor in the mixed gas are condensed into liquid. The VOCs and water naturally separate into layers due to their immiscibility or density difference.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waste gas-based resin adsorption steam desorption apparatus, characterized by: The steam desorption equipment for resin adsorption of waste gas includes a supporting base plate, an adsorption tower fixedly connected to the supporting base plate, a resin adsorption bed installed inside the adsorption tower, a waste gas pretreatment mechanism between the supporting base plate and the adsorption tower, a waste gas purification mechanism between the supporting base plate and the adsorption tower, a steam desorption mechanism between the supporting base plate and the adsorption tower, and a cooling mechanism between the supporting base plate and the adsorption tower.

2. The steam desorption equipment for waste gas resin adsorption according to claim 1, characterized in that: The waste gas pretreatment mechanism includes a first fixed frame, an induced draft fan, a first air pipe, a second air pipe, a waste gas filter, a third air pipe, a cooler, a fourth air pipe, a dehumidifier, a reinforcing frame, a fifth air pipe, and a first electric valve. The first fixed frame is fixedly connected to the support base plate, the induced draft fan is fixedly installed on the first fixed frame, the first air pipe is connected to the induced draft fan, the waste gas filter is fixedly installed on the support base plate, the second air pipe connects the induced draft fan and the waste gas filter, the cooler is fixedly installed on the support base plate, the third air pipe connects the waste gas filter and the cooler, the dehumidifier is fixedly installed on the support base plate, the fourth air pipe connects the cooler and the dehumidifier, the reinforcing frame is fixedly connected to the adsorption tower, the fifth air pipe connects the dehumidifier and the adsorption tower, the fifth air pipe is connected to the reinforcing frame, and the first electric valve is installed on the fifth air pipe.

3. The steam desorption equipment for waste gas resin adsorption according to claim 1, characterized in that: The exhaust gas purification mechanism includes a second fixed frame, a first exhaust fan, an exhaust gas purifier, a first guide pipe, a second guide pipe, and a second electric valve. The second fixed frame is fixedly connected to the support base plate, the first exhaust fan is fixedly installed on the second fixed frame, the exhaust gas purifier is fixedly installed on the support base plate, the first guide pipe connects the first exhaust fan and the exhaust gas purifier, the second guide pipe connects the first exhaust fan and the adsorption tower, and the second electric valve is installed on the second guide pipe.

4. The steam desorption equipment for waste gas resin adsorption according to claim 1, characterized in that: The steam desorption mechanism includes a steam generator, a third fixed frame, a second ejector, a first conveying pipe, a second conveying pipe, a directional hood, and a third electric valve. The steam generator is fixedly installed on the support base plate. The third fixed frame is fixedly connected to the adsorption tower. The second ejector is fixedly installed on the third fixed frame. The first conveying pipe connects the second ejector to the steam generator. The second conveying pipe connects the second ejector to the adsorption tower. The directional hood is connected to the second conveying pipe. The third electric valve is installed on the first conveying pipe.

5. The steam desorption equipment for waste gas resin adsorption according to claim 1, characterized in that: The cooling mechanism includes a fourth fixed frame, a third vacuum pump, a first flow pipe, an arc-shaped shroud, a second flow pipe, a condenser, a third flow pipe, and a phase change separator. The fourth fixed frame is fixedly connected to the support base plate, and the third vacuum pump is fixedly installed on the fourth fixed frame. The first flow pipe connects the third vacuum pump to the adsorption tower, and the arc-shaped shroud is connected to the first flow pipe. The condenser is fixedly installed on the support base plate, and the second flow pipe connects the condenser to the third vacuum pump. The phase change separator is fixedly installed on the support base plate, and the third flow pipe connects the phase change separator to the condenser.

6. The steam desorption device for waste gas resin adsorption according to claim 5, characterized in that: The condenser uses a shell-and-tube or plate heat exchanger.

7. The steam desorption device for waste gas resin adsorption according to claim 1, characterized in that: The resin adsorption bed is made of polystyrene or polyacrylate-based resin.

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