Automatic control air inlet mechanism of DMF (Dimethyl Formamide) recovery tower

Abstract

The utility model relates to an automatic control air inlet mechanism of a DMF (Dimethyl Formamide) recovery tower, which comprises a bottom plate, a filter structure is arranged outside the bottom plate, the filter structure comprises a filter box, the filter box is fixedly arranged at the top of the bottom plate, a U-shaped block is fixedly arranged in the filter box, and a first filter plate is movably connected in the U-shaped block. According to the automatic control gas inlet mechanism of the DMF recovery tower, DMF gas is fed into the filter box through the valve gas inlet pipe, large-particle impurities are filtered through the first filter plate, then small impurities are filtered through the second filter plate, and finally small-particle impurities are filtered through the third filter plate; the filtered gas enters the absorption box through the gas inlet pump via the gas distribution pipe, the gas is absorbed by the absorption liquid in the absorption box, and then the gas can be fed into the absorption tower for subsequent procedures by opening the conveying pump, so that the aim of conveniently filtering impurities in the gas is fulfilled.

Description

TECHNICAL FIELD

[0001] The utility model relates to DMF recovery tower technical field, concretely is a kind of automatic control air intake mechanism of DMF recovery tower. BACKGROUND

[0002] DMF (dimethylformamide) is a colorless transparent liquid, with extremely strong hygroscopicity and extensive solubility, can be mutually soluble with water and most organic solvents, to a variety of organic and inorganic compounds have good solubility and chemical stability, it is widely used chemical raw materials and excellent solvent, DMF recovery tower is used to recover DMF and other solvents device, it mainly utilizes the characteristics that DMF can be dissolved in water, by rectification mode DMF in waste gas is absorbed and recycled, is used in production again, help to realize the recycling of resources and environmental protection.

[0003] But the waste gas containing DMF can contain impurities, if not filtered directly containing impurities DMF waste gas is sent into device inside, it can make device internal pipeline blockage reduce the service life of device, simultaneously when absorbing liquid DMF saturation, again want to absorb liquid internal delivery DMF gas will cause waste, therefore a kind of automatic control air intake mechanism of DMF recovery tower is presented. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of prior art, the utility model provides an automatic control air intake mechanism of DMF recovery tower, has the advantages of being convenient for filtering other impurities in gas, while avoiding waste of gas, solves the problem that existing device structure needs optimization.

[0005] To achieve the above object, the utility model provides the following technical scheme: an automatic control air intake mechanism of DMF recovery tower, including bottom plate, the top of bottom plate is fixedly installed with distillation column, the outside of bottom plate is provided with filter structure, the outside of bottom plate is provided with reflux structure;

[0006] The filter structure includes filter box, the top of bottom plate is fixedly installed with filter box, the inside of filter box is fixedly installed with U-shaped block, the inside of U-shaped block is movably connected with first filter plate, the inside of U-shaped block is movably connected with second filter plate, the inside of U-shaped block is movably connected with third filter plate, the top of bottom plate is fixedly installed with absorption box, the inside of filter box is fixedly installed with air inlet pump, the top of bottom plate is fixedly installed with delivery pump.

[0007] Further, the reflux structure comprises a DMF detector, the top of the absorption box is fixedly installed with the DMF detector, the bottom of the DMF detector is fixedly installed with a detection head, the outer part of the DMF detector is provided with an electric three-way valve, the top of the filter box is fixedly installed with a box body, the inner left wall of the box body is fixedly installed with a high-voltage transformer, the inner part of the box body is fixedly installed with a negative electrode plate, and the inner part of the box body is fixedly installed with a positive electrode plate.

[0008] Further, the number of the U-shaped blocks is six, and the six U-shaped blocks are respectively located on the inner top wall and the inner bottom wall of the filter box, the front of the filter box is hingedly connected with a box door, and the front of the absorption box is provided with a control panel.

[0009] Further, the left side of the filter box is fixedly installed with a valve air inlet pipe, the left side of the air inlet pump is fixedly installed with an air outlet pipe, the inner left wall of the absorption box is fixedly installed with a gas distribution pipe, the left side of the gas distribution pipe is fixedly connected with the right side of the air inlet pump, the top of the filter box is fixedly installed with a valve liquid supplement pipe, the inner part of the absorption box is provided with absorption liquid, the left side of the conveying pump is fixedly connected with the right side of the absorption box through a liquid pumping pipe, and the top of the conveying pump is fixedly connected with the top of the distillation tower through a liquid feeding pipe.

[0010] Further, the bottom of the detection head extends to the inner part of the absorption box, the bottom of the electric three-way valve is fixedly connected with the top of the absorption box through a gas conveying pipe, the top of the DMF detector is electrically connected with the right side of the electric three-way valve, the inner part of the box body is a disinfection chamber and a temporary storage chamber, the left side of the electric three-way valve is fixedly connected with the top of the temporary storage chamber through a first connecting pipe, and the top of the electric three-way valve is fixedly connected with the top of the disinfection chamber through a second connecting pipe.

[0011] Further, the right side of the temporary storage chamber is fixedly connected with the top of the filter box through a valve reflux pipe, the right side of the high-voltage transformer is fixedly installed with an electrode rod, the right side of the electrode rod extends to the inner part of the disinfection chamber, and the left side of the box body is fixedly installed with a filter screen.

[0012] Beneficial effects

[0013] Compared with the prior art, the technical scheme has the following beneficial effects:

[0014] 1. The automatic control air inlet mechanism of the DMF recovery tower, DMF gas is sent into the filter box through the valve air inlet pipe, large particle impurities are filtered through the first filter plate, smaller impurities are filtered through the second filter plate, and then the third filter plate is used to filter the tiny particle impurities, then the filtered gas is sent into the absorption tank through the gas distribution pipe by the air inlet pump, and the gas is absorbed by the absorption liquid in the absorption tank, then the conveying pump is opened to send the gas into the absorption tower for subsequent processes, so that the impurities in the gas are conveniently filtered.

[0015] 2. The automatic control air inlet mechanism of the DMF recovery tower, the DMF detector cooperates with the detection head to detect the gas in the absorption tank, when the gas is high, it indicates that the absorption liquid reaches saturation, the valve air inlet pipe is closed, then the DMF detector controls the electric three-way valve to send the DMF gas into the inside of the temporary storage chamber, when the air does not have DMF, the generated waste gas is sent into the inside of the disinfection chamber through the electric three-way valve, then the high-voltage transformer cooperates with the negative electrode plate and the positive electrode plate to harmless treat the waste gas, and then the waste gas is directly discharged from the tank, so that the purpose of avoiding waste of gas and ensuring harmless treatment of the waste gas is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front structure schematic view of the utility model;

[0017] Figure 2 It is a front structure schematic view of the utility model;

[0018] Figure 3 It is a front structure schematic view of the utility model;

[0019] Figure 4 It is a front structure schematic view of the utility model; Figure 2 It is a front structure schematic view of the utility model;

[0020] In the figure: 1, bottom plate; 2, distillation tower; 3, filter structure; 301, filter box; 302, U-shaped block; 303, first filter plate; 304, second filter plate; 305, third filter plate; 306, absorption tank; 307, air inlet pump; 308, conveying pump; 4, reflux structure; 401, DMF detector; 402, detection head; 403, electric three-way valve; 404, tank; 405, high-voltage transformer; 406, negative electrode plate; 407, positive electrode plate. DETAILED DESCRIPTION

[0021] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0022] Please refer to Figures 1-4 The automatic control air inlet mechanism of the DMF recovery tower comprises a bottom plate 1, a distillation tower 2 is fixedly installed at the top of the bottom plate 1, a filtering structure 3 is arranged outside the bottom plate 1, and a reflux structure 4 is arranged outside the bottom plate 1.

[0023] The filtering structure 3 comprises a filtering box 301, the filtering box 301 is fixedly installed at the top of the bottom plate 1, a U-shaped block 302 is fixedly installed inside the filtering box 301, a first filtering plate 303 is movably connected inside the U-shaped block 302, a second filtering plate 304 is movably connected inside the U-shaped block 302, a third filtering plate 305 is movably connected inside the U-shaped block 302, an absorption box 306 is fixedly installed at the top of the bottom plate 1, an air inlet pump 307 is fixedly installed inside the filtering box 301, and a conveying pump 308 is fixedly installed at the top of the bottom plate 1.

[0024] Further, the reflux structure 4 comprises a DMF detector 401, the DMF detector 401 is fixedly installed at the top of the absorption box 306, a detection head 402 is fixedly installed at the bottom of the DMF detector 401, an electric three-way valve 403 is arranged outside the DMF detector 401, a box body 404 is fixedly installed at the top of the filtering box 301, a high-voltage transformer 405 is fixedly installed on the inner left wall of the box body 404, a negative electrode plate 406 is fixedly installed inside the box body 404, and a positive electrode plate 407 is fixedly installed inside the box body 404.

[0025] Specifically, as shown in Figure 2 The high-voltage transformer 405 cooperates with the electrode rod to generate a large amount of plasma, and the high-energy electrons and the gas collide to activate the gas, so that the bacteria or dust in the gas will carry the positive electrode, and the bacteria or dust carrying the positive electrode will pass through the negative electrode plate 406 and the positive electrode plate 407, and will be adsorbed on the negative electrode plate 406 under the principle of same polarity repulsion and different polarity attraction.

[0026] Specifically, as shown in Figure 2As shown, the first filter plate 303 is made of metal mesh, which has the characteristics of high strength, corrosion resistance and not easy to deform, etc., which can effectively remove large particle impurities in the fluid, such as dust, sand, etc., at the same time, the metal mesh has good chemical compatibility with DMF, and will not react with it, the second filter plate 304 is a glass fiber filter element, which has high filtering precision and good chemical stability, and can remove medium-sized particles and microorganisms in the fluid, the third filter plate 305 is a nano ceramic filter element, which has the characteristics of high precision, high strength, corrosion resistance, etc., and can remove small particles, bacteria, viruses and other impurities in the fluid, at the same time, the ceramic material has good chemical compatibility with DMF, and will not react with it, in addition, the filtering precision of the nano ceramic filter element can be adjusted, which can be selected according to specific needs.

[0027] Specifically, as shown in the figure, Figure 2 The DMF detector 401 monitors the DMF gas concentration in the absorption tank 306 in real time through the detection head 402, and outputs a signal when the DMF concentration exceeds the preset safety threshold. The signal output by the detector is transmitted to the input end of the automatic control system through the cable, the control system processes the received signal and converts it into the required instruction for controlling the electric three-way valve 403. The control system sends control instructions to the electric three-way valve 403 according to the processed signal, and the electric three-way valve 403 receives the instructions and drives the valve core to move through the internal motor and transmission mechanism, thereby changing the flow direction or adjusting the flow rate. After the electric three-way valve 403 performs the action, it can send a feedback signal to the control system through the position feedback device. The control system can monitor the working state of the electric three-way valve 403 in real time according to the feedback signal, and make further adjustments as needed.

[0028] In implementation, the following steps are taken:

[0029] 1) First, send the DMF gas into the filter tank 301, and filter the impurities in the gas in sequence by the first filter plate 303, the second filter plate 304 and the third filter plate 305;

[0030] 2) Then open the inlet pump 307 to send the filtered gas into the absorption tank 306, and be absorbed by the absorption liquid, and then be sent into the distillation column 2 through the delivery pump 308;

[0031] 3) Then detect the gas in the absorption tank 306 by the detection head 402 in cooperation with the DMF detector 401;

[0032] 4) Finally, cooperate with the electric three-way valve 403 to control the flow of the gas, and sterilize the exhaust gas through the high-voltage transformer 405, the positive electrode plate 407 and the negative electrode plate 406.

[0033] In summary, the automatic control air inlet mechanism of the DMF recovery tower, through the valve air inlet pipe, sends the DMF gas into the filter box 301, and then through the first filter plate 303, filters the large-particle impurities, and then through the second filter plate 304, filters the smaller impurities, and finally, through the third filter plate 305, filters the tiny-particle impurities, and then through the air inlet pump 307, the filtered gas enters the absorption box 306 through the air distribution pipe, and the gas is absorbed by the absorption liquid inside the absorption box 306, and then the conveying pump 308 is opened to send it into the absorption tower 2 inside for subsequent processes, so as to achieve the purpose of conveniently filtering the impurities in the gas, and through the DMF detector 401 cooperating with the detection head 402, the gas inside the absorption box 306 is detected, when the gas is high, it means that the absorption liquid reaches saturation, the valve air inlet pipe is closed, and then through the DMF detector 401, the electric three-way valve 403 is controlled to send the DMF gas into the inside of the temporary storage chamber, when the air does not have DMF, the generated waste gas is absorbed through the electric three-way valve 403 into the inside of the disinfection chamber, and then the high-voltage transformer 405 is opened in cooperation with the negative electrode plate 406 and the positive electrode plate 407 to harmless treat the waste gas, and then directly discharge the box body 404, so as to achieve the purpose of avoiding waste of gas while ensuring harmless treatment of waste gas.

[0034] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0035] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the changes in form and details of the embodiments can be made by those skilled in the art without departing from the spirit and scope of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An automatic control gas inlet mechanism of a DMF recovery column, comprising a base plate (1), characterized in that: The top of the bottom plate (1) is fixedly installed with a distillation column (2), the outside of the bottom plate (1) is provided with a filtering structure (3), and the outside of the bottom plate (1) is provided with a reflux structure (4). The filtering structure (3) comprises a filtering box (301), the top of the bottom plate (1) is fixedly installed with the filtering box (301), the inside of the filtering box (301) is fixedly installed with a U-shaped block (302), the inside of the U-shaped block (302) is movably connected with a first filter plate (303), the inside of the U-shaped block (302) is movably connected with a second filter plate (304), the inside of the U-shaped block (302) is movably connected with a third filter plate (305), the top of the bottom plate (1) is fixedly installed with an absorption box (306), the inside of the filtering box (301) is fixedly installed with an air inlet pump (307), and the top of the bottom plate (1) is fixedly installed with a conveying pump (308).

2. The automatic gas inlet mechanism of a DMF recovery tower according to claim 1, characterized in that: The reflux structure (4) comprises a DMF detector (401), the top of the absorption box (306) is fixedly installed with the DMF detector (401), the bottom of the DMF detector (401) is fixedly installed with a detection head (402), the outside of the DMF detector (401) is provided with an electric three-way valve (403), the top of the filtering box (301) is fixedly installed with a box body (404), the inner left wall of the box body (404) is fixedly installed with a high-voltage transformer (405), the inside of the box body (404) is fixedly installed with a negative electrode plate (406), and the inside of the box body (404) is fixedly installed with a positive electrode plate (407).

3. The automatic gas inlet mechanism of the DMF recovery tower according to claim 1, characterized in that: The number of the U-shaped blocks (302) is six, and the six U-shaped blocks (302) are located on the inner top wall and the inner bottom wall of the filtering box (301), respectively, the front of the filtering box (301) is hingedly connected with a box door, and the front of the absorption box (306) is provided with a control panel.

4. The automatic gas inlet mechanism of a DMF recovery tower according to claim 1, characterized in that: The left side of the filtering box (301) is fixedly installed with a valve air inlet pipe, the left side of the air inlet pump (307) is fixedly installed with an air exhaust pipe, the inner left wall of the absorption box (306) is fixedly installed with a gas distribution pipe, the left side of the gas distribution pipe is fixedly connected with the right side of the air inlet pump (307), the top of the filtering box (301) is fixedly installed with a valve liquid supplement pipe, the inside of the absorption box (306) is provided with absorption liquid, the left side of the conveying pump (308) is fixedly connected with the right side of the absorption box (306) through a liquid pumping pipe, and the top of the conveying pump (308) is fixedly connected with the top of the distillation column (2) through a liquid conveying pipe.

5. The automatic gas inlet mechanism of the DMF recovery tower according to claim 2, characterized in that: The bottom of the detection head (402) extends to the inside of the absorption box (306), the bottom of the electric three-way valve (403) is fixedly connected with the top of the absorption box (306) through a gas conveying pipe, the top of the DMF detector (401) is electrically connected with the right side of the electric three-way valve (403), the inside of the box (404) is divided into a sterilization chamber and a temporary storage chamber, the left side of the electric three-way valve (403) is fixedly connected with the top of the temporary storage chamber through a first connecting pipe, and the top of the electric three-way valve (403) is fixedly connected with the top of the sterilization chamber through a second connecting pipe.

6. The automatic gas inlet mechanism of a DMF recovery tower according to claim 5, characterized in that: The right side of the temporary storage chamber is fixedly connected with the top of the filter box (301) through a valve backflow pipe, the right side of the high-voltage transformer (405) is fixedly installed with an electrode rod, the right side of the electrode rod extends to the inside of the sterilization chamber, and the left side of the box (404) is fixedly installed with a filter screen.

Images