Dichloromethane tail gas absorption device

Abstract

The utility model provides a dichloromethane tail gas absorption device, which belongs to the technical field of dichloromethane tail gas absorption and comprises a bottom plate, the upper end face of the bottom plate is fixedly connected with a white oil absorption tower, the upper end face of the white oil absorption tower is fixedly connected with a first bearing, and the inner side wall of the inner ring of the first bearing is fixedly connected with a rotating pipe. The bottom end of the rotating pipe penetrates through the upper end face of the white oil absorption tower and extends into the white oil absorption tower, a spline shaft is slidably connected into the rotating pipe, and a stirring shaft is fixedly connected to the bottom end of the spline shaft. Through the arrangement of the first bearing, the rotating pipe, the spline shaft, the stirring shaft, the stirring paddle, the turbulent flow disc and the power mechanism, white oil is stirred in a reciprocating lifting mode, a gas-liquid interface boundary layer can be broken through stirring, the contact area is increased, dichloromethane molecules are accelerated to diffuse into the white oil, the absorption efficiency is improved, and the service life of the white oil is prolonged. The problem of low dichloromethane absorption efficiency caused by white oil standing in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to dichloromethane tail gas absorption technical field, and specifically, relate to a kind of dichloromethane tail gas absorption device. BACKGROUND

[0002] In chemical production process, dichloromethane is widely used in the manufacturing process of coating, paint, adhesive and pharmaceutical, pesticide and other products as a commonly used organic solvent. However, dichloromethane will produce a large amount of tail gas in the use process, these tail gas if not properly handled directly discharged into the atmosphere, not only will cause serious pollution to the environment, but also will pose a potential threat to human health.

[0003] Through retrieval, in prior art, patent application number CN202323596908.7 discloses a dichloromethane tail gas treatment device, including base, the upper end middle part one side of base is fixedly connected with rectifying tower, the upper end middle part of base is fixedly connected with white oil absorption tower. In the utility model, the device is used, the dichloromethane produced by the extraction tank and dryer is compressed and dried by the setting compression structure and condenser, so that the part exceeding the corresponding temperature saturated vapor pressure is condensed from gas in liquid state to reduce the separation burden of subsequent absorption and adsorption, and the dichloromethane in tail gas is further washed and dissolved by white oil, to further reduce the content of dichloromethane in tail gas, then the purified dichloromethane is further treated by the setting adsorption tower, so that it reaches the discharge standard, thereby reducing the pollution of dichloromethane to atmosphere, and being conducive to environmental protection, but still has the following defects:

[0004] (1) the white oil in prior art is used to absorb dichloromethane by standing, but the viscosity of white oil is too high, long-term standing can cause gas-liquid stratification, and gas diffusion is also prone to be blocked, so that the absorption efficiency is low;

[0005] In prior art, single adsorption plate is used to absorb and purify dichloromethane again, but the adsorption plate needs to be replaced after reaching the upper limit of adsorption, so that the terminal of dichloromethane tail gas absorption is caused, and the adsorption plate is also inconvenient to replace.

[0006] Therefore, we improve it and propose a dichloromethane tail gas absorption device. UTILITY MODEL CONTENT

[0007] The utility model aims at the problems of low efficiency of white oil absorption dichloromethane by standing and replacement of adsorption plate after reaching the upper limit.

[0008] In order to achieve the above-mentioned utility model purposes, the utility model provides the following technical scheme:

[0009] The dichloromethane tail gas absorption device is used for improving the above-mentioned problems.

[0010] The utility model provides specifically as follows:

[0011] Including bottom plate, the upper end surface of bottom plate is fixedly connected with white oil absorption tower, the upper end surface of white oil absorption tower is fixedly connected with first bearing, the inner circle inboard wall of first bearing is fixedly connected with rotating pipe, the bottom of rotating pipe penetrates the upper end surface of white oil absorption tower and extends to its inside, the spline shaft is slidably connected in rotating pipe, the bottom of spline shaft is fixedly connected with stirring shaft, a group of stirring paddles are uniformly fixedly connected on stirring shaft, the bottom of stirring shaft is fixedly connected with spoiler, power mechanism for driving spline shaft up and down and rotation is equipped on white oil absorption tower, two adsorption towers are symmetrically equipped on the right side of white oil absorption tower, adsorption mechanism is equipped in two adsorption towers, three-way tube is fixedly connected on white oil absorption tower, the output of two of three-way tube is fixedly connected with electromagnetic valve, electromagnetic valve is communicated with adsorption tower through connecting pipe, exhaust pipe is fixedly connected on two adsorption towers, gas detector is installed on exhaust pipe.

[0012] As the preferred technical scheme of the utility model, the power mechanism includes the first bevel gear fixed on the rotating pipe, the upper end surface of the white oil absorption tower is fixedly connected with the vertical plate, the bottom of the vertical plate is rotatably connected with the first connecting shaft, the inner end of the first connecting shaft is fixedly connected with the second bevel gear meshing connection with the first bevel gear, the outer end of the first connecting shaft is fixedly connected with the first pulley, the top end of the vertical plate is rotatably connected with the second connecting shaft, the outer end of the second connecting shaft is fixedly connected with the second pulley, the second pulley is drivingly connected with the first pulley through the synchronous belt, the reciprocating plate is slidably connected in the vertical plate, the end away from the vertical plate of the reciprocating plate is fixedly connected with the second bearing, the top end of the spline shaft penetrates the reciprocating plate and is fixedly connected with the inner circle inboard wall of the second bearing, the connecting seat is fixedly connected on the reciprocating plate, the connecting rod is rotatably connected in the connecting seat, the top end of the connecting rod is rotatably connected with the rotating plate, the rotating plate is fixedly connected with the shaft end of the second connecting shaft, the upper end surface of the white oil absorption tower is fixedly connected with the bearing frame, the motor is fixedly connected with the driving end of the motor, the third bevel gear is meshing connection with the first bevel gear.

[0013] As the technical scheme of the utility model is optimized, the opening is matched with the mounting plate, the inner side wall of the mounting plate is fixedly connected with the mounting frame, the mounting frame is fixedly connected with the adsorption plate, the left and right side walls of the mounting plate are both fixedly connected with the connecting lug, the adsorption tower is fixedly connected with two fixing lugs corresponding to the connecting lug, and the connecting lug is connected with the fixing lug through the bolt.

[0014] As the technical scheme of the utility model is optimized, the white oil absorption tower is respectively provided with the extraction drying tower and the rectifying tower.

[0015] As the technical scheme of the utility model is optimized, the upper end surface of the white oil absorption tower is fixedly connected with the controller, and the electromagnetic valve and the gas detector are electrically connected with the controller.

[0016] As the technical scheme of the utility model is optimized, the input end of the tee pipe is provided with the fan, and a group of through holes are uniformly formed in the spoiler.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] In the scheme of the utility model,

[0019] 1. By setting the first bearing, the rotating pipe, the spline shaft, the stirring shaft, the stirring paddle, the spoiler and the power mechanism, the white oil is reciprocatingly lifted and stirred, the stirring can break the gas-liquid interface boundary layer, increase the contact area and accelerate the diffusion of dichloromethane molecules to white oil, improve the absorption efficiency, and solve the problem of low absorption efficiency of dichloromethane caused by static white oil in the prior art.

[0020] 2. By setting the adsorption tower, the adsorption mechanism, the tee pipe, the electromagnetic valve, the connecting pipe and the gas detector, the tail gas discharged from the adsorption tower can be detected, and when the tail gas is unqualified, it indicates that the adsorption plate reaches the upper limit, and another adsorption tower is started to absorb the dichloromethane tail gas, without stopping and replacing the adsorption plate, and the replacement of the adsorption plate is more convenient, solving the problem of stopping and replacing the adsorption plate when the adsorption plate reaches the upper limit in the prior art. DRAWINGS

[0021] Figure 1 The utility model provides an overall structure schematic view;

[0022] Figure 2 The utility model provides a power mechanism structure schematic view;

[0023] Figure 3 The utility model provides a Figure 2 rear side structure schematic view;

[0024] Figure 4The structure schematic view of the adsorption mechanism is provided.

[0025] Figure 5 The structure schematic view of another view is provided.

[0026] Indicated in the figure:

[0027] 1, bottom plate; 2, white oil absorption tower; 3, first bearing; 4, rotating pipe; 5, spline shaft; 6, stirring shaft; 7, stirring paddle; 8, spoiler disc; 9, power mechanism; 901, first bevel gear; 902, vertical plate; 903, first connecting shaft; 904, second bevel gear; 905, first pulley; 906, second connecting shaft; 907, second pulley; 908, synchronous belt; 909, reciprocating plate; 9010, second bearing; 9011, connecting seat; 9012, connecting rod; 9013, rotating plate; 9014, bearing frame; 9015, motor; 9016, third bevel gear; 10, adsorption tower; 11, adsorption mechanism; 1101, mounting plate; 1102, mounting frame; 1103, adsorption plate; 1104, connecting lug; 1105, fixing lug; 12, three-way pipe; 13, electromagnetic valve; 14, connecting pipe; 15, exhaust pipe; 16, gas detector; 17, extraction drying tower; 18, rectifying tower; 19, controller. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments.

[0029] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, this embodiment proposes a dichloromethane tail gas absorption device, including a base plate 1. A white oil absorption tower 2 is fixedly connected to the upper end face of the base plate 1. A first bearing 3 is fixedly connected to the upper end face of the white oil absorption tower 2. A rotating pipe 4 is fixedly connected to the inner wall of the inner ring of the first bearing 3. The bottom end of the rotating pipe 4 penetrates the upper end face of the white oil absorption tower 2 and extends into its interior. A splined shaft 5 is slidably connected inside the rotating pipe 4. A stirring shaft 6 is fixedly connected to the bottom end of the splined shaft 5. A set of stirring paddles 7 are evenly fixedly connected to the stirring shaft 6. A turbulence plate 8 is fixedly connected to the bottom end of the stirring shaft 6. A power mechanism 9 for driving the splined shaft 5 up and down and rotating is provided on the white oil absorption tower 2. Symmetrical features are provided on the right side of the white oil absorption tower 2. Two adsorption towers 10 are provided, each equipped with an adsorption mechanism 11. A three-way pipe 12 is fixedly connected to the white oil absorption tower 2, and a solenoid valve 13 is fixedly connected to each of the two output ends of the three-way pipe 12. The solenoid valve 13 is connected to the adsorption tower 10 through a connecting pipe 14. An exhaust pipe 15 is fixedly connected to each of the two adsorption towers 10, and a gas detector 16 is installed on each of the exhaust pipes 15. The white oil in the white oil absorption tower 2 absorbs the dichloromethane tail gas. To enhance the absorption effect, the white oil is stirred by the stirring shaft 6 and the stirring paddle 7. At the same time, the turbulence plate 8 rotates up and down to enhance the stirring of the white oil, increase the contact area and contact time between the tail gas and the white oil, and improve the absorption efficiency.

[0030] like Figure 1 , Figure 2 and Figure 3As shown, in a preferred embodiment, based on the above method, the power mechanism 9 further includes a first bevel gear 901 fixed on the rotating pipe 4, a vertical plate 902 fixedly connected to the upper end face of the white oil absorption tower 2, a first connecting shaft 903 rotatably connected to the bottom of the vertical plate 902, a second bevel gear 904 meshing with the first bevel gear 901 fixedly connected to the inner end of the first connecting shaft 903, a first pulley 905 fixedly connected to the outer end of the first connecting shaft 903, and a second connecting shaft 906 rotatably connected to the top end of the vertical plate 902. A second pulley 907 is fixedly connected to the outer end of the connecting shaft 906. The second pulley 907 is connected to the first pulley 905 via a synchronous belt 908. A reciprocating plate 909 is slidably connected inside the vertical plate 902. A second bearing 9010 is fixedly connected to the end of the reciprocating plate 909 away from the vertical plate 902. The top end of the splined shaft 5 passes through the reciprocating plate 909 and is fixedly connected to the inner wall of the inner ring of the second bearing 9010. A connecting seat 9011 is fixedly connected to the reciprocating plate 909. A connecting rod 9012 is rotatably connected inside the connecting seat 9011. A rotating plate 9013 is rotatably connected to the top of the white oil absorption tower 2. The rotating plate 9013 is fixedly connected to the shaft end of the second connecting shaft 906. A support frame 9014 is fixedly connected to the upper end face of the white oil absorption tower 2. A motor 9015 is fixedly connected to the support frame 9014. A third bevel gear 9016, which meshes with the first bevel gear 901, is fixedly connected to the drive end of the motor 9015. The motor 9015 drives the third bevel gear 9016 to rotate, which in turn drives the first bevel gear 901 and the rotating tube 4 to rotate. At the same time, the rotation of the first bevel gear 901... The first bevel gear 904, the first connecting shaft 903, and the first pulley 905 are driven to rotate. The first pulley 905 is connected to the second pulley 907 via the synchronous belt 908, which causes the second connecting shaft 906 to rotate. The rotation of the second connecting shaft 906 drives the reciprocating plate 909 to slide up and down in the vertical plate 902 through the rotating plate 9013 and the connecting rod 9012. The spline shaft 5, the stirring shaft 6, the stirring paddle 7, and the turbulence plate 8 can also rotate while moving up and down, which can stir the white oil to increase its fluidity and improve the absorption efficiency and effect of dichloromethane tail gas.

[0031] like Figure 1 and Figure 4As shown, in a preferred embodiment, based on the above method, the adsorption mechanism 11 further includes an opening on the adsorption tower 10, and a mounting plate 1101 is matched inside the opening. A mounting frame 1102 is fixedly connected to the inner side wall of the mounting plate 1101, and an adsorption plate 1103 is fixedly connected inside the mounting frame 1102. Connecting ears 1104 are fixedly connected to both the left and right side walls of the mounting plate 1101. Two fixing ears 1105, respectively corresponding to the connecting ears 1104, are fixedly connected to the adsorption tower 10. The connecting ears 1104 are connected to the fixing ears 1105 by bolts. The adsorption plate 1103 further adsorbs the residual dichloromethane in the exhaust gas. The adsorption plate 1103 can be replaced as needed. The bolt connection between the connecting ears 1104 and the fixing ears 1105 facilitates installation and disassembly.

[0032] like Figure 1 and Figure 5 As shown, in a preferred embodiment, based on the above method, an extraction drying tower 17 and a distillation tower 18 are respectively provided on the outside of the white oil absorption tower 2; the internal structure of the extraction drying tower 17 and the distillation tower 18 and their connection with the white oil absorption tower 2 are existing technologies and will not be described in detail here.

[0033] like Figure 1 and Figure 5 As shown, in a preferred embodiment, based on the above method, a controller 19 is fixedly connected to the upper end face of the white oil absorption tower 2, and the solenoid valve 13 and the gas detector 16 are electrically connected to the controller 19 respectively; the controller 19 controls the opening and closing of the solenoid valve 13 through electrical signals, thereby controlling the direction of the tail gas entering the adsorption tower 10. After the adsorption on one adsorption tower 10 reaches the upper limit, another adsorption tower 10 can be activated to purify and absorb the tail gas without stopping the machine for replacement. At the same time, it is also convenient to replace the adsorption plate 1103 that has reached the adsorption upper limit.

[0034] like Figure 2 As shown, in a preferred embodiment, based on the above method, a fan is further installed in the input end of the three-way pipe 12, and a set of through holes are evenly opened on the turbulence plate 8; the fan is not shown in the figure. The fan in the three-way pipe 12 is set in the same way as the fan in the third pipe in the prior art, which can introduce the exhaust gas into the adsorption tower 10 for absorption and purification treatment. The through holes improve the stirring and turbulence effect on the white oil during the up-and-down reciprocating movement of the turbulence plate 8.

[0035] Specifically, when using this dichloromethane tail gas absorption device: first, open the solenoid valve 13 on the front side of the three-way pipe 12 and close the solenoid valve 13 on the rear side, allowing the dichloromethane tail gas to enter the extraction drying tower 17. After being concentrated by the compression structure, the dichloromethane tail gas is then condensed by the condenser to separate the portion exceeding the saturated vapor pressure at the corresponding temperature into a liquid state from the gas. This liquid is then introduced into the white oil absorption tower 2. The motor 9015 drives the third bevel gear 9016 to rotate, which in turn drives the first bevel gear 901 and the rotating tube 4 to rotate. Simultaneously, the rotation of the first bevel gear 901 drives the second bevel gear 904, the first connecting shaft 903, and the first pulley 905 to rotate. The first pulley 905 is connected to the second pulley 907 via a synchronous belt 908, causing the second connecting shaft 906 to rotate. The rotation of the second connecting shaft 906 drives the reciprocating plate 909 to slide up and down within the vertical plate 902 via the rotating plate 9013 and connecting rod 9012. The spline shaft 5, stirring shaft 6, stirring paddle 7, and turbulence plate 8 can move up and down while also rotating, which can stir the white oil and ensure that the dichloromethane tail gas is fully in contact with the white oil, thereby improving the absorption efficiency. After absorption by the white oil, the tail gas enters the adsorption tower 10, and is then absorbed again by the adsorption plate 1103 before being discharged through the exhaust pipe 15. When the front gas detector 16 detects that the emission position is not up to standard, the controller 19 controls the front solenoid valve 13 to close and the rear solenoid valve 13 to open. The tail gas then enters the subsequent adsorption tower 10 for purification without the need for shutdown. Then, the front adsorption plate 1103 is replaced.

[0036] All technical features in this embodiment can be freely combined according to actual needs.

[0037] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A dichloromethane tail gas absorption device, comprising a base plate (1), characterized in that, A white oil absorption tower (2) is fixedly connected to the upper end face of the base plate (1). A first bearing (3) is fixedly connected to the upper end face of the white oil absorption tower (2). A rotating tube (4) is fixedly connected to the inner wall of the inner ring of the first bearing (3). The bottom end of the rotating tube (4) penetrates the upper end face of the white oil absorption tower (2) and extends into it. A splined shaft (5) is slidably connected inside the rotating tube (4). A stirring shaft (6) is fixedly connected to the bottom end of the splined shaft (5). A set of stirring paddles (7) are evenly fixedly connected to the stirring shaft (6). A turbulence plate (8) is fixedly connected to the bottom end of the stirring shaft (6). The white oil absorption tower (2) The white oil absorption tower (2) is equipped with a power mechanism (9) for driving the spline shaft (5) up and down and rotate. Two adsorption towers (10) are symmetrically arranged on the right side of the white oil absorption tower (2). Adsorption mechanisms (11) are provided in both adsorption towers (10). A three-way pipe (12) is fixedly connected to the white oil absorption tower (2). Solenoid valves (13) are fixedly connected to both output ends of the three-way pipe (12). The solenoid valves (13) are connected to the adsorption towers (10) through connecting pipes (14). Exhaust pipes (15) are fixedly connected to both adsorption towers (10). Gas detectors (16) are installed on the exhaust pipes (15).

2. The dichloromethane tail gas absorption device according to claim 1, characterized in that, The power mechanism (9) includes a first bevel gear (901) fixed on the rotating tube (4), a vertical plate (902) fixedly connected to the upper end face of the white oil absorption tower (2), a first connecting shaft (903) rotatably connected to the bottom of the vertical plate (902), a second bevel gear (904) meshing with the first bevel gear (901) fixedly connected to the inner end of the first connecting shaft (903), a first pulley (905) fixedly connected to the outer end of the first connecting shaft (903), a second connecting shaft (906) rotatably connected to the top of the vertical plate (902), a second pulley (907) fixedly connected to the outer end of the second connecting shaft (906), the second pulley (907) being connected to the first pulley (905) via a synchronous belt (908), and a reciprocating plate (909) slidably connected inside the vertical plate (902). A second bearing (9010) is fixedly connected to one end of the reciprocating plate (909) away from the vertical plate (902). The top end of the splined shaft (5) passes through the reciprocating plate (909) and is fixedly connected to the inner wall of the inner ring of the second bearing (9010). A connecting seat (9011) is fixedly connected to the reciprocating plate (909). A connecting rod (9012) is rotatably connected inside the connecting seat (9011). A rotating plate (9013) is rotatably connected to the top end of the connecting rod (9012). The rotating plate (9013) is fixedly connected to the shaft end of the second connecting shaft (906). A support frame (9014) is fixedly connected to the upper end face of the white oil absorption tower (2). A motor (9015) is fixedly connected to the support frame (9014). A third bevel gear (9016) that meshes with the first bevel gear (901) is fixedly connected to the drive end of the motor (9015).

3. The dichloromethane tail gas absorption device according to claim 1, characterized in that, The adsorption mechanism (11) includes an opening on the adsorption tower (10), and an installation plate (1101) is provided in the opening. An installation frame (1102) is fixedly connected to the inner side wall of the installation plate (1101). An adsorption plate (1103) is fixedly connected inside the installation frame (1102). Connecting ears (1104) are fixedly connected to the left and right side walls of the installation plate (1101). Two fixing ears (1105) corresponding to the connecting ears (1104) are fixedly connected to the adsorption tower (10). The connecting ears (1104) are connected to the fixing ears (1105) by bolts.

4. The dichloromethane tail gas absorption device according to claim 1, characterized in that, An extraction drying tower (17) and a distillation tower (18) are respectively provided on the outside of the white oil absorption tower (2).

5. The dichloromethane tail gas absorption device according to claim 1, characterized in that, The upper end face of the white oil absorption tower (2) is fixedly connected to a controller (19), and the solenoid valve (13) and the gas detector (16) are electrically connected to the controller (19).

6. The dichloromethane tail gas absorption device according to claim 1, characterized in that, A fan is installed inside the input end of the three-way pipe (12), and a set of through holes are evenly opened on the baffle plate (8).

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