Polytetrahydrofuran production waste liquid recovery equipment

Abstract

The utility model discloses polytetrahydrofuran production waste liquid recovery equipment, which belongs to the technical field of waste liquid treatment equipment, and comprises a barrel body for collecting polytetrahydrofuran preparation waste liquid and a heating ring for separating organic alcohol, a resistance-type heating ring connected with the side wall of the barrel body is arranged above the fixing base, an air hole is formed in the top of the barrel body and extends into the barrel body, a feeding port is formed in the other side, away from the air hole, of the top of the barrel body and used for connecting raw materials with a waste liquid conveying pipe, and a driving motor for providing power is connected between the feeding port and the air hole through screws. An output shaft of the driving motor penetrates through the barrel and is connected with one end of a rotating shaft through a coupler, and the other end of the rotating shaft is rotationally connected with the inner bottom wall of the barrel. According to the utility model, not only can alcohol organic matters contained in wastewater be separated, but also acid radical ions can be neutralized, precipitated and separated through the filter screen, so that the wastewater treatment effect of the device is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of waste liquid treatment equipment, and in particular, it is a waste liquid recovery equipment for polytetrahydrofuran production. Background Technology

[0002] Polytetrahydrofuran (PTF) can be prepared from tetrahydrofuran, a class of heterocyclic organic compounds. Tetrahydrofuran is one of the strongest polar ethers and is used as a moderately polar solvent in chemical reactions and extractions. The wastewater generated during PTF production contains sulfate ions, iron sludge, foam scum, and alcoholic organic compounds. Existing equipment can only remove the iron sludge and foam carried in the wastewater; it cannot treat the sulfate ions and alcoholic organic compounds, resulting in poor treatment efficiency.

[0003] A search revealed, for example (Authorization Announcement No. CN221752523U), a waste liquid recovery device for polytetrahydrofuran production, comprising a housing, a door rotatably connected to the front of the housing, a handle fixedly connected to the front of the door, a top cover fixedly connected to the top of the housing, a water inlet hole on the top of the top cover, and a water inlet pipe fixedly connected to the top of the water inlet hole. This device solves the problem that existing equipment cannot completely remove solid impurities contained in polytetrahydrofuran waste liquid; however, this device cannot treat alcohols and acid radicals contained in the waste liquid, reducing the practicality of the device. Utility Model Content

[0004] The purpose of this invention is to provide a waste liquid recovery device for polytetrahydrofuran production to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waste liquid recovery device for polytetrahydrofuran production, comprising a barrel for collecting waste liquid from polytetrahydrofuran preparation and a heating coil for separating organic alcohols. A fixed base is connected to the bottom of the barrel, and a resistance heating coil connected to the side wall of the barrel is provided above the fixed base. An air hole is provided at the top of the barrel, extending into the interior of the barrel. An inlet is provided on the other side of the top of the barrel away from the air hole. The inlet is used to connect the raw material and waste liquid conveying pipes. A drive motor for providing power is screwed between the inlet and the air hole. The output shaft of the drive motor passes through the barrel and is connected to one end of a rotating shaft through a coupling. The other end of the rotating shaft is rotatably connected to the inner bottom wall of the barrel.

[0006] As a preferred embodiment, the bottom of the barrel is provided with an inclined, funnel-shaped material collection trough, and the bottom of the material collection trough is provided with a material pipe, the other end of which extends to the outside of the barrel.

[0007] As a preferred embodiment, a cross-shaped fixing frame is provided above the material collection tank, and the end of the fixing frame is welded to the inner wall of the tank.

[0008] As a preferred embodiment, the top of the fixed frame is rotatably connected to the end of the rotating shaft, and bushings are fixed at both ends of the rotating shaft. Two C-shaped scrapers are welded to both sides of the bushings, and the side walls of the scrapers are slidably connected to the inner wall of the barrel.

[0009] As a preferred embodiment, multiple L-shaped stirring blades with equal spacing are also fixed on the outer periphery of the rotating shaft, with the stirring blades located between the two shaft sleeves.

[0010] As a preferred embodiment, a square-shaped filter box is welded to the bottom of the fixed base, and a material channel is provided at the top of the filter box, which is connected to the material pipe.

[0011] As a preferred embodiment, the side wall of the filter box is slidably connected to two draw plates, the ends of which are welded with handles for easy gripping, and the inner wall of the draw plates is welded with two T-shaped sliding plates, which are slidably connected to the inner wall of the filter box.

[0012] As a preferred embodiment, a filter screen is embedded inside the drawer, and a discharge pipe with a solenoid valve is provided at the bottom of the filter box.

[0013] Compared with the prior art, the technical effects and advantages of this utility model are as follows:

[0014] This polytetrahydrofuran production waste liquid recovery equipment has a resistance heating coil fixed to the side wall of the tank, and a fixed base connected to the bottom of the tank. The heat generated by the heating coil is transferred to the inside of the tank through the side wall to heat the waste liquid inside the tank. Since the boiling point of alcohol is lower than that of the waste liquid, the alcohol inside the waste liquid will evaporate. Combined with the vents set at the top of the tank, the treatment is completed, improving the treatment efficiency of the device.

[0015] This polytetrahydrofuran (PTF) production wastewater recovery equipment features a filter box welded to the bottom of a fixed base. Two sliding plates are connected to the side wall of the filter box, and filter screens are embedded inside the plates. These screens filter the precipitate formed after the PTF and calcium carbonate mixture undergoes neutralization and heating reaction. A drive motor is screwed to the top of the tank, and its output shaft is connected to a rotating shaft. The other end of the rotating shaft rotates with the fixed frame. A scraper is welded to the side wall of the rotating shaft, and its rotation cleans the adhering substances from the inner wall of the tank. Through heating and stirring, the calcium carbonate aqueous solution entering the tank through the inlet reacts fully with the wastewater containing PTF. A discharge pipe with an electronic valve at the bottom of the filter box discharges the treated wastewater. Regular cleaning and replacement of the sliding plates further improves the equipment's wastewater treatment efficiency.

[0016] This device solves the problem that existing equipment cannot treat the acid radicals and alcohols contained in the wastewater from the preparation of polytetrahydrofuran, thus improving the treatment efficiency of the device. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a polytetrahydrofuran production waste liquid recovery device according to the present invention;

[0019] Figure 2 For practical purposes Figure 1 Half-section view of the barrel in the middle AA direction;

[0020] Figure 3 This is a schematic diagram of the shaft connection structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the bottom structure of the fixing base of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the drawer plate of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] In the diagram: 1. Barrel body; 2. Heating coil; 3. Fixing base; 4. Air vent; 5. Drive motor; 6. Feed inlet; 7. Gathering trough; 8. Material pipe; 9. Fixing frame; 10. Scraper; 11. Rotating shaft; 12. Stirring paddle; 13. Pull plate; 14. Discharge pipe; 15. Filter box; 16. Handle; 17. Filter screen; 18. Slide plate. Detailed Implementation

[0025] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0026] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0027] The connection method can be any existing method, such as bonding, welding, or bolting, depending on the actual needs.

[0028] The wastewater generated during the production of polytetrahydrofuran contains a variety of complex pollutants, mainly alcohols, acid radicals, iron sludge, and foam scum. However, existing equipment for treating polytetrahydrofuran wastewater can only treat iron sludge and foam scum, and the treatment effect is not good. This application mainly addresses the treatment of alcohols and acid radicals.

[0029] An embodiment of a waste liquid recovery device for polytetrahydrofuran production, such as... Figures 1 to 5 As shown, the device includes a barrel 1 for collecting waste liquid from the preparation of polytetrahydrofuran and a heating coil 2 for separating organic alcohols. A fixed base 3 is connected to the bottom of the barrel 1, and a resistance heating coil 2 connected to the side wall of the barrel 1 is provided above the fixed base 3. A vent 4 is provided at the top of the barrel 1, extending into the interior of the barrel 1. Because the boiling point of organic alcohols is higher than that of liquids, i.e., waste liquid, the heating coil 2 can directly heat the wastewater inside the barrel 1, thereby enabling the separation of alcohols in the waste liquid. The treatment of organic alcohols in the waste liquid is completed through the vent 4 at the top of the barrel 1. To prevent dust from falling into the vent 4 when it is stationary, a dust baffle is provided on its top.

[0030] A feed inlet 6 is provided on the top side of the barrel 1 away from the air hole 4. The feed inlet 6 is used to connect the raw material and waste liquid conveying pipe. The feed inlet 6 can not only directly convey the waste liquid generated during the preparation of polytetrahydrofuran into the barrel 1, but also convey the calcium carbonate aqueous solution for treating the waste liquid, making it flexible to use.

[0031] A drive motor 5, which provides power, is connected to the feed inlet 6 and the air hole 4 by a screw. The output shaft of the drive motor 5 passes through the barrel 1 and is connected to one end of the rotating shaft 11 through a coupling. The other end of the rotating shaft 11 is rotatably connected to the cross-shaped fixing frame 9. The end of the fixing frame 9 is welded to the inner wall of the barrel 1. A funnel-shaped material collection trough 7 is provided on the inner bottom wall of the barrel 1. The material collection trough 7 is located below the fixing frame 9. At the bottom of the material collection trough 7, a material pipe 8 is provided that passes through the bottom of the barrel 1. The material pipe 8 is designed to facilitate the discharge of treated wastewater.

[0032] The two ends of the rotating shaft 11 are fixed with bushings. Two symmetrically arranged C-shaped scrapers 10 are welded to the outside of the bushings. The side wall of the scraper 10 is slidably connected to the inner wall of the barrel 1. Driven by the drive motor 5, the inner wall of the barrel 1 is cleaned. An L-shaped stirring paddle 12 is welded in the middle of the rotating shaft 11. The stirring paddle 12 can accelerate the mixing efficiency of waste liquid and calcium carbonate aqueous solution and the speed of alcohol separation, which is convenient for operation.

[0033] The acid radicals are mostly sulfate ions. Sulfate ions react rapidly with calcium carbonate aqueous solution at high temperature to produce calcium sulfate precipitate and carbon dioxide gas. This process filters out the calcium sulfate in the wastewater, thus completing the treatment of sulfate ions in the wastewater.

[0034] A filter box 15 is welded to the bottom of the fixed base 3. A material channel is provided on the top of the filter box 15, which is connected to the material pipe 8. Two equally spaced draw plates 13 are provided on one side of the filter box 15. A handle 16 is welded to the end of the draw plate 13 for easy pulling. T-shaped sliding plates 18 are welded on both sides of the draw plate 13. The sliding plates 18 are slidably connected to the slide rails in the filter box 15. A filter screen 17 is embedded inside the draw plate 13. The filter screen 17 can separate the calcium sulfate precipitate produced in the waste liquid, thereby completing the treatment of the waste liquid. Together with the discharge pipe 14 with an electronic valve at the bottom of the filter box 15, the treatment of polytetrahydrofuran wastewater is completed. The draw plate 13 can be cleaned and replaced periodically.

[0035] Heating coil 2 and drive motor 5 are both conventional instruments. Their working principle, size and model are not related to the function of this application, so they will not be described in detail. The control method of this utility model is controlled by a controller. The control circuit of the controller can be implemented by a person skilled in the art through simple programming. The power supply is also common knowledge in the art. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail.

[0036] Working principle

[0037] When using this polytetrahydrofuran production waste liquid recovery equipment, the waste liquid and the calcium carbonate aqueous solution for treating the waste liquid are fed into the inside of the tank 1 through the feed port 6. At this time, the heating coil 2 is controlled to work, so that the alcohol organic matter contained in the waste liquid is separated from the wastewater and discharged through the air hole 4. Then, the output shaft of the drive motor 5 is controlled to rotate, which drives the connected rotating shaft 11 to rotate, and drives the stirring paddle 12 and scraper 10 to rotate, so that the waste liquid and calcium carbonate aqueous solution inside the tank 1 are fully mixed. After the neutralization reaction, the treated waste liquid is poured into the filter box 15 through the inner feed pipe 8.

[0038] Then, the calcium sulfate precipitate and wastewater generated are further filtered and separated by the two draw plates 13 set on the side wall of the filter box 15 and the filter screen 17 installed inside the draw plates 13, and discharged through the discharge pipe 14 with electronic valve at the bottom of the filter box 15.

[0039] It should be noted that, in this document, relational terms such as "one" and "two" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste liquid recovery device for polytetrahydrofuran production, comprising a tank (1) for collecting waste liquid from polytetrahydrofuran preparation and a heating coil (2) for separating organic alcohols, characterized in that: The bottom of the barrel (1) is connected to a fixed base (3). Above the fixed base (3) is a heating coil (2) for resistance heating connected to the side wall of the barrel (1). The top of the barrel (1) is provided with an air hole (4). The air hole (4) extends into the interior of the barrel (1). The other side of the top of the barrel (1) away from the air hole (4) is provided with a feed inlet (6). The feed inlet (6) is used to connect the raw material and waste liquid conveying pipes. A drive motor (5) that provides power is connected between the feed inlet (6) and the air hole (4) by a screw. The output shaft of the drive motor (5) passes through the barrel (1) and is connected to one end of a rotating shaft (11) through a coupling. The other end of the rotating shaft (11) is rotatably connected to the inner bottom wall of the barrel (1).

2. The polytetrahydrofuran production waste liquid recovery equipment according to claim 1, characterized in that: The bottom of the barrel (1) is provided with an inclined funnel-shaped material collection trough (7), and the bottom of the material collection trough (7) is provided with a material pipe (8), the other end of which extends to the outside of the barrel (1).

3. The polytetrahydrofuran production waste liquid recovery equipment according to claim 2, characterized in that: A cross-shaped fixing frame (9) is provided above the material tank (7), and the end of the fixing frame (9) is welded to the inner wall of the barrel (1).

4. The polytetrahydrofuran production waste liquid recovery equipment according to claim 3, characterized in that: The top of the fixed frame (9) is rotatably connected to the end of the rotating shaft (11). The two ends of the rotating shaft (11) are fixed with bushings. Two C-shaped scrapers (10) are welded to both sides of the bushings. The side wall of the scraper (10) is slidably connected to the inner wall of the barrel (1).

5. The polytetrahydrofuran production waste liquid recovery equipment according to claim 4, characterized in that: The outer periphery of the rotating shaft (11) is also fixed with a plurality of L-shaped stirring paddles (12) that are equally spaced apart, and the stirring paddles (12) are located between two bushings.

6. The polytetrahydrofuran production waste liquid recovery equipment according to claim 1, characterized in that: A square-shaped filter box (15) is welded to the bottom of the fixed base (3), and a material channel is provided on the top of the filter box (15), which is connected to the material pipe (8).

7. The polytetrahydrofuran production waste liquid recovery equipment according to claim 6, characterized in that: The side wall of the filter box (15) is slidably connected to two drawer plates (13). The end of the drawer plate (13) is welded with a handle (16) for easy gripping. The inner wall of the drawer plate (13) is welded with two T-shaped sliding plates (18). The sliding plates (18) are slidably connected to the inner wall of the filter box (15).

8. The polytetrahydrofuran production waste liquid recovery equipment according to claim 7, characterized in that: A filter screen (17) is embedded inside the drawer plate (13), and a discharge pipe (14) with a solenoid valve is provided at the bottom of the filter box (15).

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