A paraformaldehyde recovery apparatus for formaldehyde production and a method of using the same

Abstract

The present application relates to the technical field of formaldehyde production, in particular to a polyoxymethylene recovery equipment for formaldehyde production and a use method thereof, which comprises a tank body, an inlet and outlet mechanism is arranged on the tank body, a feeding mechanism is arranged on the tank body, a stirring mechanism is arranged on the feeding mechanism, a transmission mechanism is arranged in the tank body, a temperature rising mechanism is arranged in the tank body, and a support seat is fixedly connected to the bottom of the tank body; through the feeding mechanism and the stirring mechanism, the corresponding lye can be added into the tank body in time, the polyoxymethylene is promoted to react to formaldehyde under the condition of strong alkali, and the reaction is more sufficient; through the transmission mechanism, the desalted water added into the tank body is stirred to accelerate the mixing; through the temperature rising mechanism, the polyoxymethylene particles deposited in the bottom of the tank body are heated, and the raw materials in the bottom of the tank body are further stirred and mixed, so that the deposition of polyoxymethylene is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of formaldehyde production, in particular to a polyoxymethylene recovery equipment for formaldehyde production and a use method thereof. BACKGROUND

[0002] Formaldehyde has a wide range of uses in petrochemical industry, medicine, light textile, biological chemical industry, energy, transportation and other industries; it can be used as a disinfectant and preservative, and also can be used to prepare phenolic resin, urea-formaldehyde resin, melamine resin, urotropine, pentaerythritol and other products; the generation of formaldehyde is generally produced by dehydrogenation or oxidation under the catalysis of metals such as silver and copper, and also can be separated from the oxidation products of hydrocarbons; in actual production, the corresponding formaldehyde storage tank is generally used to complete the production.

[0003] However, the traditional formaldehyde production storage tank may accumulate a certain amount of polyoxymethylene at the bottom of the tank due to incomplete heating and other reasons in actual production, which seriously affects the quality of formaldehyde, and also affects the operation of the formaldehyde storage tank itself and the absorption tower, thereby reducing the system operation cycle and affecting the production efficiency; further, when the polyoxymethylene particles are deposited on the tank bottom, the discharge pipe is easily blocked, which affects the normal work of the device. SUMMARY

[0004] In view of the problems in the prior art, the present application provides a polyoxymethylene recovery equipment for formaldehyde production and a use method thereof.

[0005] The technical scheme adopted by the present application to solve the technical problem is: a polyoxymethylene recovery equipment for formaldehyde production, comprising a tank body, an inlet and outlet mechanism is arranged on the tank body, a feeding mechanism is arranged on the tank body, a stirring mechanism is arranged on the feeding mechanism, a transmission mechanism is arranged in the tank body, a temperature raising mechanism is arranged in the tank body, and a support seat is fixedly connected to the bottom of the tank body.

[0006] The feeding mechanism comprises a mounting frame, the mounting frame is fixedly connected to the tank body, a first motor is arranged on the mounting frame, a rotating rod is connected to the output end of the first motor, the rotating rod is rotatably connected to the inside of the mounting frame, the bottom end of the rotating rod extends into the tank body, a resisting rod is fixedly connected to the side wall inner cavity of the mounting frame, an enclosing block is slidably connected to the side wall inner cavity of the mounting frame, a spring is wound on the enclosing block, the spring is fixedly connected to the enclosing block and the mounting frame, a through groove is arranged on the mounting frame and the tank body, a through hole is arranged on the enclosing block, and the diameter of the through hole is the same as that of the through groove.

[0007] The stirring mechanism comprises a first stirring paddle and a second stirring paddle, a plurality of first stirring paddles are fixedly connected to the rotating rod, and a second stirring paddle is fixedly connected to the bottom end of the rotating rod.

[0008] Specific, the import and export mechanism includes a feed pipe, the tank body is fixedly connected with the feed pipe, the tank body is fixedly connected with the discharge pipe, and the tank body is fixedly connected with the infusion tube.

[0009] Specific, the transmission mechanism includes a connecting rod, the side wall of the tank body is rotatably connected with the connecting rod, the connecting rod is fixedly connected with a third stirring paddle, the rotating rod is fixedly connected with a first gear, the first gear is engaged with a second gear, the second gear is fixedly connected with a transmission rod, the transmission rod is fixedly connected with a third gear, the connecting rod is fixedly connected with a fourth gear, and the third gear is engaged with the fourth gear.

[0010] Specific, the temperature rising mechanism includes a second motor, the inside of the tank body is provided with the second motor, the output end of the second motor is rotatably connected with a cross rod, the cross rod is rotatably connected in the tank body, and the cross rod is fixedly connected with a fourth stirring paddle, the fourth stirring paddle is provided with a plurality of fourth stirring paddles, and the plurality of fourth stirring paddles are linearly distributed at equal intervals, the bottom end of the tank body is provided with an electric heating wire, and the electric heating wire is in a corrugated shape.

[0011] Specific, the support seat is provided with two at the bottom of the tank body, and the whole support seat is in H shape.

[0012] A use method of a polyformaldehyde recovery equipment for formaldehyde production, comprising the following steps:

[0013] S1: first, through the cooperation of the feeding mechanism and the stirring mechanism, the corresponding lye can be added to the inside of the tank body in time during use, and the polyformaldehyde is promoted to react in the direction of formaldehyde under the condition of strong alkali;

[0014] S2: then, through the transmission mechanism, the desalted water added into the tank body can be stirred to accelerate the mixing uniformity;

[0015] S3: finally, through the temperature rising mechanism, the polyformaldehyde particles deposited at the bottom of the tank body cavity are heated, and the raw materials at the bottom of the tank body cavity can also be stirred and mixed.

[0016] The beneficial effects of the present application are:

[0017] (1) The polyformaldehyde recovery equipment for formaldehyde production and its use method, when in use, the feeding mechanism is arranged on the tank body, and the stirring mechanism is arranged on the feeding mechanism, and through the cooperation of the feeding mechanism and the stirring mechanism, the corresponding lye can be added to the inside of the tank body in time during use, the polyformaldehyde is promoted to react towards the direction of formaldehyde under the condition of strong alkali, the reaction is more sufficient, and the production efficiency is improved; that is, during actual operation, the user can first add an appropriate amount of lye to the inside of the mounting frame, then during actual production, the user can connect the power supply to the first motor, the first motor rotates to drive the rotating rod to rotate, the rotating rod rotates to drive the first stirring paddle to rotate, the lye stored in the inside of the mounting frame is conveniently stirred uniformly, at the same time, the rotating rod rotates to drive the abutting rod to rotate together, with the rotation of the abutting rod, the end of the sealing block is extruded and abutted, the sealing block is displaced, the spring is compressed at the same time, and the through hole in the sealing block is aligned with the through groove until this time, the lye in the inside of the mounting frame flows into the inside of the tank body through the through groove and the through hole in the sealing block, with the continuous repetition of the operation of the abutting rod, the lye flows into the inside of the tank body intermittently, and further, with the rotation of the rotating rod, the second stirring paddle is also driven to rotate together, the lye just entering the inside of the tank body is conveniently stirred uniformly, so that the corresponding lye can be added to the inside of the tank body in time during use, the polyformaldehyde is promoted to react towards the direction of formaldehyde under the condition of strong alkali, the reaction is more sufficient, and the production efficiency is improved.

[0018] (2) The polyformaldehyde recovery equipment for formaldehyde production and its use method, when in use, the transmission mechanism is arranged on the tank body, and through the transmission mechanism, the desalted water added into the inside of the tank body is conveniently stirred, the mixing is accelerated, the reaction is further strengthened, and the production efficiency is improved; that is, with the rotation of the rotating rod, the first gear is driven to rotate together, the first gear rotates to drive the second gear to rotate, the second gear rotates to drive the transmission rod to rotate together, with the rotation of the transmission rod, the third gear is driven to rotate together, the third gear rotates to drive the fourth gear to rotate, the fourth gear rotates to drive the connecting rod to rotate, with the rotation of the connecting rod, the third stirring paddle is driven to rotate together, with the rotation of the third stirring paddle, the material stock near the liquid inlet pipe is stirred, so that the desalted water added into the inside of the tank body is conveniently stirred, the mixing is accelerated, the reaction is further strengthened, and the production efficiency is improved.

[0019] (3) The polyformaldehyde recovery equipment for formaldehyde production and the use method thereof, when in use, the heating mechanism is arranged in the tank body, and the polyformaldehyde particles deposited on the bottom of the tank body cavity are heated through the heating mechanism, and the raw materials on the bottom of the tank body cavity are further stirred and mixed, so that the deposition of the polyformaldehyde is reduced, the discharge pipe is prevented from being blocked, and the normal work of the device is ensured; that is, in actual operation, the polyformaldehyde produced in production is gradually deposited on the bottom of the tank body cavity, at this time, the electric heating wire is electrified to heat the bottom of the tank body cavity, and the second motor is connected to the power supply, so that the second motor rotates to drive the cross rod to rotate, and the cross rod drives the fourth stirring paddle to rotate, through the above operation, the polyformaldehyde particles deposited on the bottom of the tank body cavity are heated, and the raw materials on the bottom of the tank body cavity are further stirred and mixed, so that the deposition of the polyformaldehyde is reduced, the discharge pipe is prevented from being blocked, and the normal work of the entire device is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0020] The application will be further described below in combination with the drawings and examples.

[0021] Figure 1 The overall structure schematic diagram of a preferred embodiment of the polyformaldehyde recovery equipment for formaldehyde production provided by the application is shown in the figure.

[0022] Figure 2 The connection structure schematic diagram of the tank body, the feeding mechanism, the stirring mechanism and the transmission mechanism of the application is shown in the figure.

[0023] Figure 3 The connection structure schematic diagram of the tank body and the heating mechanism of the application is shown in the figure.

[0024] Figure 4 The enlarged schematic diagram of the A part structure shown in the figure. Figure 2 The enlarged schematic diagram of the B part structure shown in the figure.

[0025] Figure 5 The enlarged schematic diagram of the C part structure shown in the figure. Figure 2 The enlarged schematic diagram of the B part structure shown in the figure.

[0026] Figure 6 The enlarged schematic diagram of the C part structure shown in the figure. Figure 2 The enlarged schematic diagram of the D part structure shown in the figure.

[0027] Figure 7 The enlarged schematic diagram of the D part structure shown in the figure. Figure 3 The enlarged schematic diagram of the D part structure shown in the figure.

[0028] As shown in the figure: 1, tank body; 2, inlet and outlet mechanism; 201, feed pipe; 202, discharge pipe; 203, infusion tube; 3, feeding mechanism; 301, installation frame; 302, first motor; 303, rotating rod; 304, stopper; 305, sealing block; 306, through slot; 307, spring; 4, stirring mechanism; 401, first stirring paddle; 402, second stirring paddle; 5, transmission mechanism; 501, first gear; 502, second gear; 503, transmission rod; 504, third gear; 505, fourth gear; 506, connecting rod; 507, third stirring paddle; 6, temperature rising mechanism; 601, second motor; 602, cross rod; 603, fourth stirring paddle; 604, electric heating wire; 7, support seat. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0030] As Figures 1-7 shown, the polyformaldehyde recovery equipment for formaldehyde production, comprising a tank body 1, the tank body 1 is provided with an inlet and outlet mechanism 2, the tank body 1 is provided with a feeding mechanism 3, the feeding mechanism 3 is provided with a stirring mechanism 4, the inside of the tank body 1 is provided with a transmission mechanism 5, the inside of the tank body 1 is provided with a temperature rising mechanism 6, the bottom of the tank body 1 is fixedly connected with a support seat 7;

[0031] The feeding mechanism 3 comprises an installation frame 301, the tank body 1 is fixedly connected with the installation frame 301, the installation frame 301 is provided with a first motor 302, the output end of the first motor 302 is connected with a rotating rod 303, the rotating rod 303 is rotatably connected in the inside of the installation frame 301, and the bottom end of the rotating rod 303 extends into the inside of the tank body 1, the rotating rod 303 is fixedly connected with a stopper 304 on the side wall inner cavity of the installation frame 301, the side wall inner cavity of the installation frame 301 is slidably connected with a sealing block 305, the sealing block 305 is wound with a spring 307, the spring 307 is fixedly connected on the sealing block 305 and the installation frame 301, the installation frame 301 and the tank body 1 are provided with a through slot 306 in common, the sealing block 305 is provided with a through hole corresponding to the through slot 306, and the diameter of the through hole is the same as that of the through slot 306;

[0032] The stirring mechanism 4 comprises a first stirring paddle 401 and a second stirring paddle 402, a plurality of first stirring paddles 401 are fixedly connected to the rotating rod 303, and the bottom end of the rotating rod 303 is fixedly connected with the second stirring paddle 402; in use, the feeding mechanism 3 is arranged on the tank body 1, and the stirring mechanism 4 is arranged on the feeding mechanism 3, and the feeding mechanism 3 and the stirring mechanism 4 are matched, so that the corresponding lye can be added to the inside of the tank body 1 in time during use, and the reaction direction of polyformaldehyde to formaldehyde is promoted under strong alkali conditions, so that the reaction is more sufficient, and the production efficiency is improved; that is, in actual operation, the user can first add an appropriate amount of lye to the inside of the placement frame 301, then in the actual production process, the user can connect the power supply to the first motor 302, the first motor 302 rotates to drive the rotating rod 303 to rotate, the rotating rod 303 rotates to drive the first stirring paddle 401 to rotate, which facilitates uniform stirring of the lye stored in the inside of the placement frame 301, at the same time, the rotating rod 303 rotates to drive the abutting rod 304 to rotate together, with the rotation of the abutting rod 304, the end of the sealing block 305 is extruded and abutted, so that the sealing block 305 is displaced, and the spring 307 is compressed at the same time, until the through hole in the sealing block 305 is aligned with the through groove 306, at this time, the lye in the inside of the placement frame 301 flows into the inside of the tank body 1 through the through groove 306 and the through hole in the sealing block 305, with the continuous repetition of the above operation of the abutting rod 304, the lye will be intermittently flowed into the inside of the tank body 1, and further, with the rotation of the rotating rod 303, the second stirring paddle 402 is also driven to rotate, which facilitates uniform stirring of the lye just entering the inside of the tank body 1, so that the corresponding lye can be added to the inside of the tank body 1 in time during use, and the reaction direction of polyformaldehyde to formaldehyde is promoted under strong alkali conditions, so that the reaction is more sufficient, and the production efficiency is improved.

[0033] Specifically, the inlet and outlet mechanism 2 comprises a feeding pipe 201, the tank body 1 is fixedly connected with the feeding pipe 201, the tank body 1 is fixedly connected with a discharging pipe 202, and the tank body 1 is fixedly connected with a liquid conveying pipe 203; in use, the material is conveniently fed into the inside of the tank body 1 through the feeding pipe 201, and the material is conveniently discharged through the discharging pipe 202, and an appropriate amount of desalted water is conveniently added to the inside of the tank body 1 through the liquid conveying pipe 203.

[0034] Specific, the transmission mechanism 5 includes connecting rod 506, the side wall of the tank 1 is rotatably connected with connecting rod 506, the connecting rod 506 is fixedly connected with the third stirring paddle 507, the rotating rod 303 is fixedly connected with the first gear 501, the first gear 501 is engaged with the second gear 502, the second gear 502 is fixedly connected with the transmission rod 503, the transmission rod 503 is fixedly connected with the third gear 504, the connecting rod 506 is fixedly connected with the fourth gear 505, and the third gear 504 is engaged with the fourth gear 505; in use, the transmission mechanism 5 is arranged on the tank 1, and the desalted water added into the tank 1 is stirred through the transmission mechanism 5, the mixing is accelerated, the reaction is further strengthened, and the production efficiency is improved; that is, with the rotation of the rotating rod 303, the first gear 501 rotates together, the rotation of the first gear 501 drives the second gear 502 to rotate, the rotation of the second gear 502 drives the transmission rod 503 to rotate, with the rotation of the transmission rod 503, the third gear 504 rotates together, the rotation of the third gear 504 drives the fourth gear 505 to rotate, the rotation of the fourth gear 505 drives the connecting rod 506 to rotate, with the rotation of the connecting rod 506, the third stirring paddle 507 rotates together, with the rotation of the third stirring paddle 507, the material stock solution near the infusion tube 203 is stirred, so that the desalted water added into the tank 1 is stirred, the mixing is accelerated, the reaction is further strengthened, and the production efficiency is improved.

[0035] Specific, the heating mechanism 6 includes a second motor 601, the inside of the tank body 1 is provided with the second motor 601, the output end of the second motor 601 is rotatably connected with the cross bar 602, the cross bar 602 is rotatably connected to the tank body 1 inside, and the fourth stirring paddle 603 is fixedly connected to the cross bar 602, the fourth stirring paddle 603 is provided with a plurality of, and a plurality of fourth stirring paddles 603 are linearly distributed at equal intervals, the bottom end of the tank body 1 is provided with an electric heating wire 604, and the electric heating wire 604 is in a corrugated shape; in use, the heating mechanism 6 is arranged in the tank body 1, and the heating mechanism 6 is used to heat the polyformaldehyde particles deposited on the bottom of the inner cavity of the tank body 1, and further facilitate the stirring and mixing of the raw materials on the bottom of the inner cavity of the tank body 1, so as to reduce the deposition of polyformaldehyde and avoid the blockage of the discharge pipe, and ensure the normal work of the device; that is, in actual operation, the polyformaldehyde produced in production will gradually deposit on the bottom of the inner cavity of the tank body 1, at this time, the electric heating wire 604 can be electrified to heat the bottom of the inner cavity of the tank body 1, and the second motor 601 is connected to the power supply, then the second motor 601 rotates to drive the cross bar 602 to rotate, and the cross bar 602 drives the fourth stirring paddle 603 to rotate, through the above operation, the polyformaldehyde particles deposited on the bottom of the inner cavity of the tank body 1 are heated, and the raw materials on the bottom of the inner cavity of the tank body 1 are further stirred and mixed, so as to reduce the deposition of polyformaldehyde and avoid the blockage of the discharge pipe, and ensure the normal work of the whole device.

[0036] Specific, the support seat 7 is provided with two at the bottom of the tank body 1, and the whole support seat 7 is in H shape; in use, the support seat 7 supports and fixes the whole device.

[0037] A method for using a polyformaldehyde recovery equipment for formaldehyde production, comprising the following steps:

[0038] S1: first, through the cooperation of the feeding mechanism 3 and the stirring mechanism 4, the corresponding lye can be added to the inside of the tank body 1 in time during use, and the polyformaldehyde is promoted to react in the direction of formaldehyde under the condition of strong base;

[0039] S2: then, through the transmission mechanism 5, the desalted water added into the tank body 1 can be stirred to accelerate the mixing;

[0040] S3: finally, through the heating mechanism 6, the polyformaldehyde particles deposited on the bottom of the inner cavity of the tank body 1 are heated, and the raw materials on the bottom of the inner cavity of the tank body 1 are also stirred and mixed.

[0041] In use, first, the entire device is supported and fixed by the support seat 7; in actual operation, the material is conveniently fed into the inside of the tank body 1 through the feeding pipe 201, and the material is discharged through the discharging pipe 202, and an appropriate amount of desalted water is added to the inside of the tank body 1 through the infusion pipe 203; then, the user can first add an appropriate amount of lye to the inside of the placement frame 301, and then in the actual production process, the user can connect the power supply to the first motor 302, and then the first motor 302 rotates to drive the rotating rod 303 to rotate, and the rotating rod 303 rotates to drive the first stirring paddle 401 to rotate, which facilitates uniform stirring of the lye stored in the inside of the placement frame 301, and at the same time, the rotating rod 303 rotates to drive the abutting rod 304 to rotate together, and with the rotation of the abutting rod 304, the end of the sealing block 305 is extruded and resisted, causing the sealing block 305 to displace, and the spring 307 is compressed at the same time, until the through hole on the sealing block 305 is aligned with the through groove 306, at this time, the lye in the inside of the placement frame 301 flows into the inside of the tank body 1 through the through groove 306 and the through hole on the sealing block 305, and with the continuous repetition of the above operation of the abutting rod 304, the lye will flow into the inside of the tank body 1 intermittently, and further, with the rotation of the rotating rod 303, the second stirring paddle 402 will also be driven to rotate, which facilitates uniform stirring of the lye just entering the inside of the tank body 1, so that the corresponding lye can be added to the inside of the tank body 1 in time during use, facilitating the promotion of the reaction of polyformaldehyde to formaldehyde under strong alkali conditions, making the reaction more sufficient and improving the production efficiency; further, with the rotation of the rotating rod 303, the first gear 501 will also be driven to rotate, the first gear 501 rotates to drive the second gear 502 to rotate, the second gear 502 rotates to drive the transmission rod 503 to rotate, and with the rotation of the transmission rod 503, the third gear 504 will also be driven to rotate, the third gear 504 rotates to drive the fourth gear 505 to rotate, the fourth gear 505 rotates to drive the connecting rod 506 to rotate, and with the rotation of the connecting rod 506, the third stirring paddle 507 will also be driven to rotate, and with the rotation of the third stirring paddle 507, the material stock near the infusion pipe 203 will be stirred, thereby facilitating the stirring of the desalted water added to the inside of the tank body 1, accelerating the mixing of the desalted water, further strengthening the reaction, and improving the production efficiency; in addition, the polyformaldehyde precipitate produced during production will gradually deposit on the bottom of the inner cavity of the tank body 1, at this time, the electric heating wire 604 can be energized to heat the bottom of the inner cavity of the tank body 1, and at the same time, the second motor 601 is connected to the power supply, and then the second motor 601 rotates to drive the cross rod 602 to rotate, and the cross rod 602 rotates to drive the fourth stirring paddle 603 to rotate, thereby facilitating the heating of the polyformaldehyde particles deposited on the bottom of the inner cavity of the tank body 1, and further facilitating the stirring and mixing of the raw materials on the bottom of the inner cavity of the tank body 1, so as to reduce the deposition of polyformaldehyde and avoid clogging of the discharging pipe 202, thereby ensuring the normal operation of the entire device.

[0042] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identity of the reference signs therein.

[0043] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A paraformaldehyde recovery device for formaldehyde production, characterized in that, Including the tank body (1), be equipped with inlet and outlet mechanism (2) on the tank body (1), be equipped with feeding mechanism (3) on the tank body (1), be equipped with stirring mechanism (4) on the feeding mechanism (3), the inside of the tank body (1) is equipped with transmission mechanism (5), the inside of the tank body (1) is equipped with temperature rising mechanism (6), the bottom of the tank body (1) is fixedly connected with support seat (7); The feeding mechanism (3) includes the installation frame (301), the tank body (1) is fixedly connected with installation frame (301), the first motor (302) is equipped on the installation frame (301), the output end of the first motor (302) is connected with the rotating rod (303), the rotating rod (303) is rotatably connected in the inside of installation frame (301), and the bottom end of the rotating rod (303) extends to the inside of the tank body (1), the rotating rod (303) is fixedly connected with the stop rod (304) on the bottom inner cavity of installation frame (301), the bottom inner cavity of installation frame (301) is slidably connected with the sealing block (305), the spring (307) is wound on the sealing block (305), and the spring (307) is fixedly connected on the sealing block (305) and installation frame (301), the installation frame (301) and the tank body (1) are equipped with the through groove (306) in common, the sealing block (305) is equipped with the corresponding through hole, and the diameter of the through hole is same with the diameter of the through groove (306), the rotating rod (303) is rotated to drive the stop rod (304) to rotate, with the rotation of the stop rod (304), the end of the sealing block (305) is extruded and contacted, the sealing block (305) is displaced, and the spring (307) is compressed at the same time, the through hole on the sealing block (305) is aligned with the through groove (306); The stirring mechanism (4) includes the first stirring paddle (401) and the second stirring paddle (402), a plurality of first stirring paddles (401) are fixedly connected on the rotating rod (303) in the installation frame, and the second stirring paddle (402) is fixedly connected on the bottom end of the rotating rod (303); The temperature rising mechanism (6) includes the second motor (601), the inside of the tank body (1) is equipped with the second motor (601), the output end of the second motor (601) is rotatably connected with the cross rod (602), the cross rod (602) is rotatably connected in the inside of the tank body (1), and the fourth stirring paddle (603) is fixedly connected on the cross rod (602); The fourth stirring paddle (603) is equipped with a plurality of, and a plurality of fourth stirring paddles (603) are linearly distributed at equal intervals; The bottom end of the tank body (1) is equipped with the electric heating wire (604), and the electric heating wire (604) is in a corrugated shape; The support seat (7) is provided with two on the bottom of the tank body (1), and the whole support seat (7) is in H shape; The transmission mechanism (5) includes the connecting rod (506), the side wall of the tank body (1) is rotatably connected with the connecting rod (506), and the third stirring paddle (507) is fixedly connected on the connecting rod (506); The rotating rod (303) is fixedly connected with a first gear (501), the first gear (501) is engaged with a second gear (502), the second gear (502) is fixedly connected with a transmission rod (503), the transmission rod (503) is fixedly connected with a third gear (504), the connecting rod (506) is fixedly connected with a fourth gear (505), and the third gear (504) is engaged with the fourth gear (505).

2. The paraformaldehyde recovery apparatus for formaldehyde production according to claim 1, characterized by: The import and export mechanism (2) comprises a feeding pipe (201), the tank body (1) is fixedly connected with the feeding pipe (201), the tank body (1) is fixedly connected with a discharging pipe (202), and the tank body (1) is fixedly connected with a transfusion pipe (203).

3. A method of using a paraformaldehyde recovery apparatus for the production of formaldehyde according to any one of claims 1-2, characterized in that, The method comprises the following steps: S1: first, by the cooperation of the feeding mechanism (3) and the stirring mechanism (4), the corresponding lye is added to the inside of the tank body (1) in time during use, and the reaction direction of polyformaldehyde to formaldehyde is promoted under the condition of strong base; S2: then, by the transmission mechanism (5), the desalted water added into the tank body (1) is stirred to accelerate the mixing uniformity; S3: finally, by the heating mechanism (6), the polyformaldehyde particles deposited on the bottom of the inner cavity of the tank body (1) are heated, and the raw materials on the bottom of the inner cavity of the tank body (1) are also stirred and mixed.

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