Dichloromethane waste gas purification and recovery system

Abstract

The invention relates to the technical field of waste gas purification and separation, in particular to a dichloromethane waste gas purification and recovery system which is mainly characterized in that a first auxiliary mechanism and a second auxiliary mechanism are arranged in a pretreatment device main body and are matched for use, so that good pretreatment work is carried out on purification treatment work of waste gas; the positive effect on improving the working efficiency of the purification treatment system is achieved; a rotating control motor in the first auxiliary mechanism drives a storage connecting cylinder to rotate, the storage connecting cylinder drives a fan-shaped plate body arranged on the side wall of the storage connecting cylinder and an impurity removal cotton swab in the second auxiliary mechanism to rotate, and impurity particles in waste gas are adsorbed and filtered in the process; the influence of solid pollutants such as impurity particles on subsequent treatment work is avoided as much as possible; the solid pollutants such as impurity particles can be separated from the waste gas, meanwhile, the stable operation of the subsequent purification treatment work can be ensured, and the device has a positive effect on improving the purification and recovery work benefits.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas purification and separation, and in particular to a dichloromethane waste gas purification and recovery system. Background Art

[0002] Dichloromethane is widely used as an organic solvent in industry, mainly from film production, medicine and other fields. Due to the bioaccumulation and biotoxicity of dichloromethane, direct emission has serious and lasting negative impacts on the human living environment; the existing patent document with announcement number CN208694635U discloses a dichloromethane waste gas purification and recovery system, which includes a water spray tower, a demister tower, a first tube-type condenser, an induced draft fan, a white oil absorption system, a white oil desorption system and a dichloromethane recovery system connected in sequence, and a wastewater storage tank connected to the white oil desorption system, which is respectively connected to the first tube-type condenser, the white oil absorption system, the white oil desorption system and the dichloromethane recovery system. The refrigerated brine circulation system; the scheme basically removes some soluble organic pollutants in the exhaust gas through the water spray tower, and then dehumidifies, dries and cools the exhaust gas in turn through the demister tower and the first tube-in-tube condenser. Finally, the exhaust gas passes through the white oil absorption system to basically remove the dichloromethane component in the exhaust gas and directly meets the emission standards; at the same time, the saturated absorption liquid is regenerated and reused through the white oil desorption system, and the high-concentration dichloromethane exhaust gas after desorption is condensed and recovered through the dichloromethane recovery system. The whole process is simple and stable in operation, and efficient and economical purification of dichloromethane exhaust gas is achieved.

[0003] The above scheme is about the purification and recovery of dichloromethane in the prior art. The first step is generally to filter out impurities in the exhaust gas through a spray device. During this process, precipitation will form at the bottom of the spray device after long-term operation, which is difficult to handle and also has the risk of clogging the sewage discharge system. The dichloromethane purification and recovery system in the prior art lacks a corresponding exhaust gas pretreatment device to separate the impurity particles in the gas. In order to further improve the efficiency of purification and recovery work, further improvement and optimization are needed.

[0004] To this end, the present invention proposes a dichloromethane waste gas purification and recovery system for solving the above problems. Summary of the invention

[0005] The object of the present invention is to provide a dichloromethane waste gas purification and recovery system to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a purification and recovery system for dichloromethane waste gas, comprising a pretreatment device body, an air inlet, an outlet, a sealing door, a first auxiliary mechanism and a second auxiliary mechanism; the pretreatment device body is arranged on a supporting frame, an air inlet is arranged on one side of the pretreatment device body, an outlet is arranged on the top of the pretreatment device body, a door is arranged on the side wall of the pretreatment device body, an installation slot is arranged on the side position of the door, a handle is fixedly arranged on the outer side wall of the sealing door, a sealing auxiliary card plate is fixedly arranged on the inner side wall of the sealing door, a first auxiliary mechanism is arranged in the pretreatment device body, and the first auxiliary mechanism is connected to the second auxiliary mechanism.

[0007] Preferably, the first auxiliary mechanism includes a rotation control motor, a connecting shaft, a connecting disk, a storage connecting cylinder, a connecting tank body, a filling port, a sealing cap, a connecting pipe, a fan-shaped plate body, a flow cavity, a docking socket, an auxiliary circular hole, a connecting tube body, a connecting hole, a frustum-shaped connecting port, an auxiliary cotton strip, and an auxiliary mesh hole; the rotation control motor is fixedly arranged on the top of the pretreatment device body, and the rotation control motor is connected to the connecting shaft, a connecting disk is fixedly arranged on the bottom end of the connecting shaft, the connecting disk is adapted to be snap-fitted with the connecting tank body, and the connecting tank body is arranged on the top end of the storage connecting cylinder, the connecting disk is fixed by screws, a filling port is arranged on the top end of the storage connecting cylinder, a sealing cap is threadedly provided on the filling port, and the outer wall of the storage connecting cylinder is equidistantly provided with A connecting pipe, one end of which is connected to a fan-shaped plate body, a circulation cavity is provided in the fan-shaped plate body, docking sockets are symmetrically provided on both sides of the fan-shaped plate body, the auxiliary circular holes are equidistantly provided on the fan-shaped plate body, a connecting pipe body is equidistantly provided in the circulation cavity, the connecting pipe body corresponds to the setting position of the auxiliary circular holes, and the pipe mouth of the connecting pipe body is connected to the auxiliary circular holes, connecting holes are equidistantly provided on the connecting pipe body, the connecting holes are connected to the circulation cavity, a frustum-shaped connecting port is fixedly provided on the outer side wall of the orifice of the connecting hole, auxiliary slivers are equidistantly provided at the side positions of the orifice of the auxiliary circular hole, the auxiliary slivers are set to be hollow, and auxiliary mesh holes are equidistantly provided on the auxiliary slivers; the fan-shaped plate body is connected to a second auxiliary mechanism.

[0008] Preferably, the fan-shaped plate body and the connecting pipe are arranged in corresponding positions, have the same number of groups, and are connected to each other; the fan-shaped plate body is arranged in a ring shape at equal distances on the outer side wall of the storage connecting tube.

[0009] Preferably, the frustum-shaped connecting port and the communicating hole are arranged at corresponding positions and have the same number of groups, and the large port of the frustum-shaped connecting port is connected to the orifice of the communicating hole.

[0010] Preferably, the auxiliary tampon is arranged in a ring shape at equal distances on the side of the opening of the auxiliary circular hole, and the auxiliary tampon is arranged obliquely.

[0011] Preferably, the second auxiliary mechanism includes a connecting seat, a cotton swab for removing impurities, a fastening screw, an auxiliary spherical surface, a storage auxiliary groove body, a docking slot, a connecting groove body, and a hollow column cavity; the connecting seat is fixedly arranged at one end of the cotton swab for removing impurities, and the end face of the other end of the cotton swab for removing impurities is arranged as a spherical surface, the connecting seat is fixed to the outer side wall of the storage connecting tube by a fastening screw, and the side wall of the cotton swab for removing impurities is equidistantly provided with storage auxiliary groove bodies, the docking slot is arranged on one side of the cotton swab for removing impurities, and a connecting groove body is arranged in the docking slot, and the hollow column cavity is arranged in the cotton swab for removing impurities.

[0012] Preferably, the impurity-removing cotton sticks are equidistantly arranged in a ring shape on the outer side wall of the storage connecting cylinder, two impurity-removing cotton sticks are arranged as a group, and the impurity-removing cotton sticks are symmetrically arranged about the fan-shaped plate body.

[0013] Preferably, the impurity removing cotton swab and the hollow column cavity are arranged in corresponding positions and in the same number of groups, one impurity removing cotton swab is provided with a hollow column cavity, and the center lines of the two are on the same straight line; the hollow column cavity is arranged in communication with the connecting groove body, and the groove cross-section of the auxiliary storage groove body is arranged to be trapezoidal.

[0014] Preferably, the docking slots and the docking sockets on the side of the fan-shaped plate body have corresponding setting positions and the same number of setting groups, and the two are adaptably plugged in.

[0015] Preferably, two impurity removing cotton sticks are symmetrically arranged on both sides of the fan-shaped plate body, the impurity removing cotton sticks are evenly arranged in multiple layers on the storage connecting cylinder, the fan-shaped plate body is evenly arranged in multiple layers on the storage connecting cylinder, and the fan-shaped plates on adjacent layers are staggered.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The pretreatment device of the purification and recovery system of dichloromethane waste gas designed by the present invention mainly performs a good pretreatment work on the purification and treatment work of the waste gas by arranging a first auxiliary mechanism and a second auxiliary mechanism in the main body of the pretreatment device for use, which has a positive effect on improving the working efficiency of the purification and treatment system; the storage connection cylinder is driven to rotate by the rotation control motor in the first auxiliary mechanism, and the storage connection cylinder drives the fan-shaped plate body arranged on its side wall and the impurity removal cotton stick in the second auxiliary mechanism to rotate, and this process is used to adsorb and filter the impurity particles in the waste gas, and try to avoid the impurity particles and other solid pollutants therein from affecting the subsequent treatment work; and the impurity removal cotton stick is symmetrically arranged on both sides of the fan-shaped plate body, and the impurity removal cotton stick is evenly arranged on the storage connection cylinder. Multiple layers are arranged, and the fan-shaped plate bodies are evenly arranged on the storage connection cylinder. The fan-shaped plates on adjacent layers are staggered. Compared with the existing simple use of a filter net for impurity removal, the present invention has corresponding anti-blocking performance, and while ensuring that the solid pollutants such as impurity particles are separated from the waste gas, the stable operation of the subsequent purification treatment work can also be ensured, and the present invention has a positive effect on improving the efficiency of purification and recovery work. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the front side of the structure connection of the exhaust gas purification pretreatment device of the present invention; Figure 2 It is a schematic diagram of the back side of the structure connection of the exhaust gas purification pretreatment device of the present invention; Figure 3 This is a schematic diagram of the internal structure connection of the pretreatment device of the present invention; Figure 4 For the present invention Figure 3 A magnified schematic diagram of the local structural connection; Figure 5 This is a schematic diagram of the connection between the main body of the pretreatment device of the present invention and the sealing door structure; Figure 6 A top view of the structural connection between the first auxiliary mechanism and the second auxiliary mechanism of the present invention; Figure 7 For the present invention Figure 6 A magnified schematic diagram of the local structural connection; Figure 8 A bottom view of the structural connection between the first auxiliary mechanism and the second auxiliary mechanism of the present invention; Fig. 9 It is a schematic diagram of the connection of the fan-shaped plate structure in the first auxiliary mechanism of the present invention; Fig.10 For the present invention Fig. 9 A magnified schematic diagram of the local structural connection; Fig.11 It is a schematic diagram of the connection of the local structure inside the fan-shaped plate body of the present invention; Fig.12 For the present invention Fig.11 A magnified schematic diagram of the local structural connection; Fig.13 This is a schematic diagram of the local structure connection of the auxiliary sliver of the present invention; Fig.14 It is a schematic diagram of the left side of the second auxiliary mechanism structure connection of the present invention; Fig.15 It is a schematic diagram of the right side of the second auxiliary mechanism structure connection of the present invention; Fig.16 For the present invention Fig.15 A magnified schematic diagram of the local structural connection; Fig.17 This is a schematic diagram of the internal structure connection of the impurity removal cotton stick of the present invention; Fig.18 For the present invention Fig.17 Enlarged schematic diagram of local structural connection.

[0018] In the figure: supporting frame 1, pretreatment device body 2, air inlet 3, exhaust outlet 4, sealing door 5, doorway 6, installation card slot 7, handle 8, sealing auxiliary card plate 9, rotation control motor 1001, connecting shaft 1002, connecting disk 1003, storage connecting cylinder 1004, connecting tank body 1005, filling port 1006, sealing cap 1007, connecting pipe 1008, fan-shaped plate body 1009, circulation cavity 1010, docking socket 1011, auxiliary circular hole 1012, connecting tube body 1013, connecting hole 1014, frustum-shaped connecting port 1015, auxiliary cotton strip 1016, auxiliary mesh 1017, connecting seat 1101, impurity removal cotton swab 1102, fastening screw 1103, auxiliary spherical surface 1104, storage auxiliary tank body 1105, docking slot 1106, connecting tank body 1107, hollow column cavity 1108. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely below. The embodiments of the present invention and all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figure 1-Figure 18A purification and recovery system for dichloromethane waste gas comprises a pretreatment device body 2, an air inlet 3, an outlet 4, a sealing door 5, a first auxiliary mechanism and a second auxiliary mechanism; the pretreatment device body 2 is arranged on a support frame 1, an air inlet 3 is arranged on one side of the pretreatment device body 2, an outlet 4 is arranged on the top of the pretreatment device body 2, a door 6 is arranged on the side wall of the pretreatment device body 2, an installation slot 7 is arranged on the side position of the door 6, a handle 8 is fixedly arranged on the outer side wall of the sealing door 5, a sealing auxiliary card plate 9 is fixedly arranged on the inner side wall of the sealing door 5, a first auxiliary mechanism is arranged in the pretreatment device body 2, and the first auxiliary mechanism is connected to the second auxiliary mechanism. ; The present invention mainly performs a good pretreatment work on the purification of waste gas by setting a first auxiliary mechanism and a second auxiliary mechanism in the main body 2 of the pretreatment device for use in conjunction, which has a positive effect on improving the working efficiency of the purification system; the rotation control motor 1001 in the first auxiliary mechanism drives the storage connecting cylinder 1004 to rotate, and the storage connecting cylinder 1004 drives the fan-shaped plate body 1009 set on its side wall and the impurity removal cotton stick 1102 in the second auxiliary mechanism to rotate. This process adsorbs and filters the impurity particles in the exhaust gas to avoid the solid pollutants such as the impurity particles therein from affecting the subsequent treatment work.

[0021] Example 2: Based on Example 1, please refer to Figure 3-Figure 13The first auxiliary mechanism includes a rotation control motor 1001, a connecting shaft 1002, a connecting disk 1003, a storage connection cylinder 1004, a connecting tank 1005, a filling port 1006, a sealing cap 1007, a connecting pipe 1008, a fan-shaped plate 1009, a flow cavity 1010, a docking socket 1011, an auxiliary circular hole 1012, a connecting tube body 1013, a connecting hole 1014, a frustum-shaped connecting port 1015, an auxiliary cotton strip 1016, and an auxiliary mesh 1017; the rotation control motor 1001 is fixed The storage tank 1004 is fixedly provided with a filling port 1006, and a sealing cap 1007 is provided on the filling port 1006, and the storage tank 1004 is provided with a filling port 1006. The outer wall of the connecting cylinder 1004 is equidistantly provided with a connecting pipe 1008, one end of the connecting pipe 1008 is connected to the fan-shaped plate 1009, a flow cavity 1010 is provided in the fan-shaped plate 1009, and docking sockets 1011 are symmetrically provided on both sides of the fan-shaped plate 1009, and auxiliary circular holes 1012 are equidistantly provided on the fan-shaped plate 1009, and a connecting pipe body 1013 is equidistantly provided in the flow cavity 1010, and the connecting pipe body 1013 corresponds to the setting position of the auxiliary circular hole 1012, and the pipe of the connecting pipe body 1013 is The opening is connected to the auxiliary circular hole 1012, and connecting holes 1014 are equidistantly arranged on the connecting tube body 1013. The connecting hole 1014 is connected to the flow cavity 1010, and a frustum-shaped connecting opening 1015 is fixedly provided on the outer wall of the opening of the connecting hole 1014. Auxiliary cotton strips 1016 are equidistantly arranged on the side positions of the opening of the auxiliary circular hole 1012. The auxiliary cotton strips 1016 are hollow, and auxiliary mesh holes 1017 are equidistantly arranged on the auxiliary cotton strips 1016; the fan-shaped plate body 1009 is connected to the second auxiliary mechanism.

[0022] In this embodiment, the rotary control motor 1001 drives the storage connection tube 1004 to rotate, and the fan-shaped plate body 1009 arranged on the outer wall of the storage connection tube 1004 will also rotate. In order to meet the purification needs, a suitable purifier can be added to the storage connection tube 1004, and the purifier enters the flow cavity 1010 of the fan-shaped plate body 1009 through the connecting pipe 1008. The fan-shaped plate body 1009 here corresponds to the setting position of the connecting pipe 1008, the setting number of groups is the same, and the two are connected; the fan-shaped plate body 1009 is equidistantly arranged in a ring shape on the outer wall of the storage connection tube 1004; the cone-shaped connection port 1015 here corresponds to the setting position of the connecting hole 1014, the setting number of groups is the same, and the large port of the cone-shaped connection port 1015 is connected to the connecting hole 1014. The opening of the through hole 1014 is connected and arranged; the auxiliary cotton strips 1016 here are equidistantly arranged in a ring shape on the side positions of the opening of the auxiliary circular hole 1012, and the auxiliary cotton strips 1016 are inclined; the exhaust gas entering from the air inlet 3 is subjected to a certain purification treatment to reduce the pressure for subsequent purification treatment work; the purpose of setting a conical connecting port 1015 on the connecting hole 1014 on the connecting tube body 1013 is to prevent foreign particles from entering the flow cavity 1010 in the fan-shaped plate body 1009 as much as possible, and the auxiliary cotton strips 1016 are arranged at the opening of the auxiliary circular hole 1012. There is also a similar effect. The auxiliary cotton strips 1016 can also absorb the purifier flowing out from the conical connecting port 1015, continue the purification work, and try to avoid causing a lot of waste.

[0023] Example 3: Based on Example 2, please refer to Figure 7 and Figure 14-18The second auxiliary mechanism here includes a connecting seat 1101, a cotton swab 1102, a fastening screw 1103, an auxiliary spherical surface 1104, a storage auxiliary slot 1105, a docking slot 1106, a connecting slot 1107, and a hollow column cavity 1108; the connecting seat 1101 is fixedly arranged at one end of the cotton swab 1102, and the end surface of the other end of the cotton swab 1102 is arranged as a spherical surface, the connecting seat 1101 is fixed to the outer wall of the storage connecting tube 1004 by fastening screws 1103, and the side wall of the cotton swab 1102 is equidistantly provided with storage auxiliary slots 1105, and the docking slot 1106 is arranged on one side of the cotton swab 1102, and the docking slot 1106 is arranged in A connecting groove body 1107 is provided, and a hollow column cavity 1108 is provided in the impurity-removing cotton stick 1102; the impurity-removing cotton sticks 1102 here are arranged in a ring shape at equal intervals on the outer wall of the storage connecting tube 1004, two impurity-removing cotton sticks 1102 are arranged as a group, and the impurity-removing cotton sticks 1102 are symmetrically arranged about the fan-shaped plate body 1009; the impurity-removing cotton sticks 1102 here are arranged in corresponding positions to the hollow column cavity 1108, and the number of arranged groups is the same, one impurity-removing cotton stick 1102 is provided with a hollow column cavity 1108, and the center lines of the two are on the same straight line; the hollow column cavity 1108 is arranged in communication with the connecting groove body 1107, and the notch cross-section of the storage auxiliary groove body 1105 is arranged to be trapezoidal.

[0024] The impurity removal cotton stick 1102 provided in the present scheme is used in conjunction with the fan-shaped plate body 1009, the docking slot 1106 here corresponds to the docking socket 1011 on the side of the fan-shaped plate body 1009, and the number of sets is the same, and the two are adapted to be plugged in; the impurity removal cotton stick 1102 here is symmetrically arranged on both sides of the fan-shaped plate body 1009, and the impurity removal cotton stick 1102 is evenly arranged in multiple layers on the storage connection cylinder 1004, and the fan-shaped plate body 1009 is evenly arranged in multiple layers on the storage connection cylinder 1004, and the fan-shaped plate bodies 1009 on adjacent layers are staggered; wherein the purifier can enter the impurity removal cotton stick 1102 from the fan-shaped plate body 1009, and the impurity removal cotton stick 110 2 is soaked, this process can improve the purification effect of the purifier on the one hand; secondly, it improves the adhesion of the impurity-removing cotton swab 1102 to solid pollutants such as impurity particles, and further improves its separation efficiency; a storage auxiliary groove 1105 is arranged on the outer wall of the impurity-removing cotton swab 1102, which has a storage function for the impurity particles; the impurity-removing cotton swab 1102 arranged here is detachable, and a door 6 is arranged on the side wall of the pretreatment device body 2, when the first auxiliary mechanism or the second auxiliary mechanism in the pretreatment device body 2 needs to be maintained, it has corresponding convenience, and it is convenient for the disassembly, cleaning or replacement of the impurity-removing cotton swab 1102, which can better meet the actual use needs.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dichloromethane waste gas purification and recovery system, characterized in that: The invention comprises a pretreatment device body (2), an air inlet (3), an outlet (4), a sealing door (5), a first auxiliary mechanism and a second auxiliary mechanism; the pretreatment device body (2) is arranged on a support frame (1); an air inlet (3) is arranged on one side of the pretreatment device body (2); an outlet (4) is arranged on the top of the pretreatment device body (2); a door (6) is arranged on the side wall of the pretreatment device body (2); a mounting slot (7) is arranged on the side of the door (6); a handle (8) is fixedly arranged on the outer side wall of the sealing door (5); a sealing auxiliary card plate (9) is fixedly arranged on the inner side wall of the sealing door (5); a first auxiliary mechanism is arranged in the pretreatment device body (2); and the first auxiliary mechanism is connected to the second auxiliary mechanism.

2. A dichloromethane waste gas purification and recovery system according to claim 1, characterized in that: The first auxiliary mechanism comprises a rotation control motor (1001), a connecting shaft (1002), a connecting disk (1003), a storage connection cylinder (1004), a connecting tank body (1005), a filling port (1006), a sealing cap (1007), a connecting pipe (1008), a fan-shaped plate body (1009), a flow cavity (1010), a docking socket (1011), an auxiliary circular hole (1012), a connecting tube body (1013), a connecting hole (1014), a frustum-shaped connecting port (1015), an auxiliary cotton strip (1016), and an auxiliary mesh hole (1017); the rotation control motor (1001) is fixedly arranged At the top of the pretreatment device body (2), a rotation control motor (1001) is connected to a connecting shaft (1002), a connecting disk (1003) is fixedly arranged at the bottom end of the connecting shaft (1002), the connecting disk (1003) is adapted to be snap-fitted with a connecting tank body (1005), and the connecting tank body (1005) is arranged at the top end of a storage connecting tube (1004), the connecting disk (1003) is fixed by screws, a filling port (1006) is arranged at the top end of the storage connecting tube (1004), a sealing cap (1007) is threadedly connected to the filling port (1006), and the storage connecting tube (1004) is provided with a sealing cap (1007) in a threaded manner. The outer wall of the cylinder (1004) is provided with connecting pipes (1008) at equal intervals, one end of the connecting pipe (1008) is connected to the fan-shaped plate (1009), a circulation cavity (1010) is provided in the fan-shaped plate (1009), docking sockets (1011) are symmetrically provided on both sides of the fan-shaped plate (1009), the auxiliary circular holes (1012) are provided at equal intervals on the fan-shaped plate (1009), and a connecting pipe body (1013) is provided at equal intervals in the circulation cavity (1010), the connecting pipe body (1013) corresponds to the setting position of the auxiliary circular holes (1012), and the connecting pipe body (1013) is provided at a position corresponding to the auxiliary circular holes (1012). The pipe mouth is connected to the auxiliary circular hole (1012); the connecting pipe body (1013) is provided with connecting holes (1014) at equal intervals; the connecting holes (1014) are connected to the circulation cavity (1010); the outer wall of the opening of the connecting hole (1014) is fixedly provided with a frustum-shaped connecting port (1015); auxiliary cotton strips (1016) are equidistantly provided at the side positions of the opening of the auxiliary circular hole (1012); the auxiliary cotton strips (1016) are hollow, and auxiliary mesh holes (1017) are equidistantly provided on the auxiliary cotton strips (1016); the fan-shaped plate body (1009) is connected to the second auxiliary mechanism.

3. A dichloromethane waste gas purification and recovery system according to claim 2, characterized in that: The fan-shaped plate body (1009) and the connecting tube (1008) are arranged at corresponding positions, have the same number of groups, and are connected to each other; the fan-shaped plate body (1009) is arranged in a ring-like shape at equal distances on the outer wall of the storage connecting tube (1004).

4. A dichloromethane waste gas purification and recovery system according to claim 2, characterized in that: The frustum-shaped connecting port (1015) and the communicating hole (1014) are arranged at corresponding positions and have the same number of groups, and the large port of the frustum-shaped connecting port (1015) is connected to the orifice of the communicating hole (1014).

5. A dichloromethane waste gas purification and recovery system according to claim 2, characterized in that: The auxiliary cotton strips (1016) are arranged in a ring-like shape at equal distances on the side of the opening of the auxiliary circular hole (1012), and the auxiliary cotton strips (1016) are arranged at an angle.

6. A dichloromethane waste gas purification and recovery system according to claim 1, characterized in that: The second auxiliary mechanism comprises a connecting seat (1101), a cotton swab (1102), a fastening screw (1103), an auxiliary spherical surface (1104), an auxiliary storage tank (1105), a docking slot (1106), a connecting tank (1107), and a hollow column cavity (1108); the connecting seat (1101) is fixedly arranged at one end of the cotton swab (1102), and the end surface of the other end of the cotton swab (1102) is arranged as a spherical surface. The connecting seat (1101) is fixed to the outer side wall of the storage connecting tube (1004) by means of a fastening screw (1103); storage auxiliary slots (1105) are equidistantly arranged on the side wall of the impurity-removing cotton stick (1102); the docking slot (1106) is arranged on one side of the impurity-removing cotton stick (1102); a connecting slot (1107) is arranged in the docking slot (1106); and the hollow column cavity (1108) is arranged in the impurity-removing cotton stick (1102).

7. A dichloromethane waste gas purification and recovery system according to claim 6, characterized in that: The impurity-removing cotton sticks (1102) are arranged in a ring-like shape at equal intervals on the outer wall of the storage connection tube (1004), two impurity-removing cotton sticks (1102) are arranged as a group, and the impurity-removing cotton sticks (1102) are symmetrically arranged with respect to the fan-shaped plate body (1009).

8. A dichloromethane waste gas purification and recovery system according to claim 6, characterized in that: The positions of the impurity-removing cotton sticks (1102) and the hollow column cavities (1108) are corresponding, and the number of sets is the same; one impurity-removing cotton stick (1102) is provided with a hollow column cavity (1108), and the center lines of the two are on the same straight line; the hollow column cavity (1108) is connected to the connecting tank body (1107), and the notch cross-section of the storage auxiliary tank body (1105) is set to be trapezoidal.

9. A dichloromethane waste gas purification and recovery system according to claim 6, characterized in that: The docking slots (1106) and the docking sockets (1011) on the side of the fan-shaped plate body (1009) are arranged at corresponding positions and have the same number of groups, and the two are adapted to be plugged in.

10. A dichloromethane waste gas purification and recovery system according to claim 6, characterized in that: Two impurity-removing cotton sticks (1102) are symmetrically arranged on both sides of the fan-shaped plate body (1009); the impurity-removing cotton sticks (1102) are arranged in multiple layers at equal intervals on the storage connection tube (1004); the fan-shaped plate bodies (1009) are arranged in multiple layers at equal intervals on the storage connection tube (1004); and the fan-shaped plate bodies (1009) on adjacent layers are arranged in a staggered manner.

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