Acid polymerization inhibitor adding device in acrylic acid production process

Abstract

The utility model relates to the technical field of acrylic acid production, solves the technical problem of low acrylic acid production efficiency, and particularly relates to an acid polymerization inhibitor adding device in an acrylic acid production process, which comprises a reaction tank for generating acrylic acid through reaction, and a polymerization inhibitor atomizing mechanism for adding a polymerization inhibitor into the reaction tank is arranged at the top end of the reaction tank. A reaction accelerating mechanism for accelerating mixing of the polymerization inhibitor is arranged on the reaction tank, the polymerization inhibitor atomizing mechanism comprises a spraying seat fixed at the top end of the reaction tank through a bracket, one end of the spraying seat is movably connected with a rear cover, and the top end of the spraying seat is fixedly connected with a gas phase pipe. According to the utility model, due to the arrangement of the polymerization inhibitor atomizing mechanism, waste gas generated when acrylic acid is generated in the reaction tank can be utilized to pressurize the interior of the spray seat, so that a polymerization inhibitor entering the interior of the spray seat and flowing in through the polymerization inhibitor storage tank is sprayed out through the spray head, and the sprayed atomized polymerization inhibitor can react with raw materials in the reaction tank more quickly.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of acrylic acid production especially relates to an acid polymerization inhibitor adding device in acrylic acid production process. BACKGROUND

[0002] Acrylic acid has a broad market prospect because it can generate various unique performance polymers with other chemical products due to the unsaturated carboxylic acid structure in the molecule. However, acrylic acid is chemically active and prone to polymerization in the production process, which affects production. Therefore, a polymerization inhibitor needs to be added to the rectifying tower in the production of acrylic acid to achieve the purpose of preventing polymerization. However, one of the existing acid polymerization inhibitor adding devices in the acrylic acid production process is mainly to send the proportionally mixed polymerization inhibitor solution to each part of the rectifying tower by using a metering pump. This process involves a traditional pipe transportation addition method, which has limited effect on the polymerization inhibition of gas phase components, resulting in a shorter operation cycle of the refining unit and directly affecting the production cost of the acrylic acid device. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model provides an acid polymerization inhibitor adding device in the acrylic acid production process, which solves the technical problem of low production efficiency of acrylic acid and achieves the purpose of improving production efficiency.

[0004] To solve the above technical problems, the utility model provides the following technical scheme: an acid polymerization inhibitor adding device in the acrylic acid production process, comprising a reaction tank for reacting to generate acrylic acid, a polymerization inhibitor atomization mechanism for adding a polymerization inhibitor to the inside of the reaction tank is arranged at the top end of the reaction tank, and an accelerated reaction mechanism for accelerating the mixing of the polymerization inhibitor is arranged on the reaction tank.

[0005] The polymerization inhibitor atomization mechanism comprises a spray seat fixed at the top end of the reaction tank through a support, one end of the spray seat is movably connected with a rear cover, a gas phase pipe is fixedly connected to the top end of the spray seat, a liquid phase pipe is fixedly connected to the opposite end of the spray seat relative to the rear cover, and a spray head extending to the upper side of the inside of the reaction tank is connected to the bottom end of the spray seat.

[0006] Preferably, a polymerization inhibitor storage tank is mounted on one side of the top end of the reaction tank through a support, the discharge end of the polymerization inhibitor storage tank is connected with the liquid inlet end of the liquid phase pipe, a feeding pipe is fixedly connected to one end of the outside of the reaction tank, and the gas inlet end of the connecting pipe is connected with one side of the top end of the reaction tank through the connecting pipe.

[0007] Preferably, the accelerated reaction mechanism comprises a support frame fixedly connected to the inside of the reaction tank, a stirring rod is rotatably connected to the middle of the support frame, and a closed box is fixedly connected to the middle of the top end of the support frame.

[0008] Preferably, a driven bevel gear is fixedly connected to the top end of the stirring rod inside the closed box, and a driving bevel gear is rotatably connected to the driven bevel gear.

[0009] Preferably, a stirring motor is mounted on one end of the outside of the reaction tank through a base, and the transmission end of the stirring motor is connected to the end of the driving bevel gear.

[0010] Preferably, a raw material adding pipe is connected to one end of the outside of the reaction tank, a one-way plate is mounted on the discharge end of the raw material adding pipe, and a discharge valve is connected to one side of the bottom end of the reaction tank.

[0011] By the above technical scheme, the acid polymerization inhibitor adding device in the production process of acrylic acid is provided, and at least has the following beneficial effects:

[0012] 1. The setting of the polymerization inhibitor atomization mechanism can utilize the waste gas generated when acrylic acid is generated in the reaction tank to pressurize the inside of the spray seat, so that the polymerization inhibitor flowing into the inside of the spray seat through the polymerization inhibitor storage tank is sprayed by the spray head, and the atomized polymerization inhibitor can react with the raw material in the reaction tank more quickly.

[0013] 2. The setting of the accelerated reaction mechanism can accelerate the mixing speed of the raw material mixed with the polymerization inhibitor in the reaction tank through stirring, thereby improving the production efficiency of acrylic acid and providing pneumatic force for the polymerization inhibitor atomization mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0014] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application.

[0015] In the drawings:

[0016] Fig. 1 It is a perspective structural schematic view of the present application;

[0017] Fig. 2 It is a spray head mounting structure schematic view of the present application;

[0018] Fig. 3 It is a driven bevel gear mounting structure schematic view of the present application.

[0019] In the drawings: 1, reaction tank;

[0020] 2, polymerization inhibitor atomization mechanism; 201, spray seat; 202, rear cover; 203, gas phase pipe; 204, liquid phase pipe; 205, spray head; 206, polymerization inhibitor storage tank; 207, feeding pipe; 208, connecting pipe;

[0021] 3, accelerate reaction mechanism; 301, support frame; 302, stirring rod; 303, closed box; 304, driven bevel gear; 305, driving bevel gear; 306, stirring motor; 307, raw material adding pipe; 308, one-way plate; 309, discharge valve. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] Embodiment 1

[0024] One of the existing acid inhibitor adding devices in the acrylic acid production process is mainly to use a metering pump to send the inhibitor solution proportioned according to the proportion to each part of the rectifying tower. The inhibitor adding method involved in this process is the traditional pipe transportation adding. The effect of the inhibitor on the gas phase component is limited, which leads to a shorter operation cycle of the refining unit and directly affects the production cost of the acrylic acid device. Please refer to Figs. 1-3 The present embodiment provides an acid inhibitor adding device in the acrylic acid production process, which solves the technical problem of low production efficiency of acrylic acid. The device comprises a reaction tank 1 for reaction to generate acrylic acid, an inhibitor atomization mechanism 2 provided at the top end of the reaction tank 1 for adding inhibitor to the inside thereof, and an accelerated reaction mechanism 3 provided on the reaction tank 1 for accelerating the mixing of the inhibitor. The inhibitor is atomized and sprayed out by the inhibitor atomization mechanism 2, and the reaction process is accelerated by the accelerated reaction mechanism 3, thereby providing pneumatic force to the inhibitor atomization mechanism 2.

[0025] In order to spray the inhibitor out by the power provided by the accelerated reaction mechanism 3. The inhibitor atomization mechanism 2 comprises a spray seat 201 fixed at the top end of the reaction tank 1 by a support, a rear cover 202 movably connected at one end of the spray seat 201, a gas phase pipe 203 fixedly connected at the top end of the spray seat 201, a liquid phase pipe 204 fixedly connected at the opposite end of the spray seat 201 and the rear cover 202, and a spray head 205 connected at the bottom end of the spray seat 201 and extending to the upper side inside the reaction tank 1.

[0026] In order to temporarily store the inhibitor. A inhibitor storage tank 206 is mounted on one side of the top end of the reaction tank 1 by a support, the discharge end of the inhibitor storage tank 206 is connected with the liquid inlet end of the liquid phase pipe 204, a feeding pipe 207 is fixedly connected at one end outside the reaction tank 1, and the gas inlet end of the adapter pipe 208 is connected with one side of the top end of the reaction tank 1 through the adapter pipe 208.

[0027] The waste gas generated by the reaction mechanism 3 during the reaction operation can enter the inside of the spray seat 201 through the connecting pipe 208, and the polymerization inhibitor in the polymerization inhibitor storage tank 206 can flow into the inside of the spray seat 201 through the liquid phase pipe 204 due to gravity. As the content of waste gas in the inside of the spray seat 201 increases, the polymerization inhibitor in the inside of the spray seat 201 can be sprayed into the inside of the reaction tank 1 through the spray head 205, thereby realizing the uniform spraying of the polymerization inhibitor in the form of mist into the inside of the reaction tank 1, and enabling the mixing of the polymerization inhibitor to be more uniform.

[0028] Embodiment 2

[0029] On the basis of embodiment 1, embodiment 1 solves the technical problem of low production efficiency of acrylic acid, but there is still the problem of low mixing efficiency of raw materials and polymerization inhibitor. In combination with Figs. 1-3 As shown in the figure, the specific implementation process is as follows: in order to accelerate the mixing of the polymerization inhibitor and the raw materials, the acceleration reaction mechanism 3 includes a support frame 301 fixedly connected in the inside of the reaction tank 1, a stirring rod 302 rotatably connected in the middle of the support frame 301, an enclosed box 303 fixedly connected at the top end of the support frame 301, a driven bevel gear 304 fixedly connected at the top end of the stirring rod 302 in the inside of the enclosed box 303, a driving bevel gear 305 rotatably connected in the inside of the enclosed box 303 and engaged with the driven bevel gear 304, and a stirring motor 306 installed on one end of the outside of the reaction tank 1 through a base, with the transmission end of the stirring motor 306 connected with the end of the driving bevel gear 305.

[0030] In order to facilitate the addition and discharge of the raw materials relative to the inside of the reaction tank 1, a raw material adding pipe 307 is connected to one end of the outside of the reaction tank 1, a one-way plate 308 is installed at the discharge end of the raw material adding pipe 307, and a discharge valve 309 is connected to one side of the bottom end of the reaction tank 1.

[0031] The raw materials are added to the inside of the reaction tank 1 through the raw material adding pipe 307 installed on one side of the reaction tank 1, and then the stirring motor 306 is started. At this time, the stirring motor 306 will drive the driving bevel gear 305 connected with the transmission end to rotate, and the driving bevel gear 305 will drive the driven bevel gear 304 engaged therewith to rotate, and the driven bevel gear 304 will drive the stirring rod 302 connected therewith to rotate. At this time, the stirring rod 302 will stir the raw materials in the inside of the reaction tank 1, and the waste gas generated during the stirring of the raw materials will provide pneumatic force to the polymerization inhibitor atomization mechanism 2 through the connecting pipe 208, and finally the finished product is discharged through the discharge valve 309 installed on one side of the bottom end of the reaction tank 1.

[0032] It should be noted that, in this document, the terms "comprise", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that comprise a list of elements are not limited to those elements, but can include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses.

[0033] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the present application, which is defined by the appended claims and their equivalents.

Claims

1. An acid polymerization inhibitor adding device in an acrylic acid production process, comprising a reaction tank (1) for reacting to produce acrylic acid, characterized in that: The reaction tank (1) top is provided with a polymerization inhibitor atomizing mechanism (2) for adding polymerization inhibitor to its interior, the reaction tank (1) is provided with an accelerated reaction mechanism (3) for accelerating the mixing of polymerization inhibitor; The polymerization inhibitor atomizing mechanism (2) comprises a spray seat (201) fixed on the top of the reaction tank (1) by a support, one end of the spray seat (201) is movably connected with a rear cover (202), the top of the spray seat (201) is fixedly connected with a gas phase pipe (203), the opposite end of the spray seat (201) and the rear cover (202) is fixedly connected with a liquid phase pipe (204), and the bottom of the spray seat (201) is connected with a spray head (205) extending to the upper side of the reaction tank (1).

2. An acid polymerization inhibitor addition device in an acrylic acid production process according to claim 1, characterized in that: One side of the top of the reaction tank (1) is provided with a polymerization inhibitor storage tank (206) mounted by a support, the discharge end of the polymerization inhibitor storage tank (206) is connected with the liquid inlet end of the liquid phase pipe (204), one end of the outer side of the reaction tank (1) is fixedly connected with a feeding pipe (207), and the gas inlet end of the feeding pipe (207) is connected with one side of the top of the reaction tank (1) through a connecting pipe (208).

3. An acid polymerization inhibitor addition device in an acrylic acid production process according to claim 1, characterized in that: The accelerated reaction mechanism (3) comprises a support frame (301) fixedly connected in the reaction tank (1), a stirring rod (302) rotatably connected in the middle of the support frame (301), and a closed box (303) fixedly connected at the top of the support frame (301).

4. An acid polymerization inhibitor addition device in an acrylic acid production process according to claim 3, characterized in that: A driven bevel gear (304) is fixedly connected at the top of the stirring rod (302) in the closed box (303), and a driving bevel gear (305) is rotatably connected in the closed box (303) and engaged with the driven bevel gear (304).

5. An acid polymerization inhibitor addition device in an acrylic acid production process according to claim 4, characterized in that: A stirring motor (306) is mounted at one end of the outer side of the reaction tank (1) through a base, and the driving end of the stirring motor (306) is connected with the end of the driving bevel gear (305).

6. An acid polymerization inhibitor addition device in an acrylic acid production process according to claim 1, characterized in that: A raw material adding pipe (307) is connected at one end of the outer side of the reaction tank (1), a one-way plate (308) is mounted at the discharge end of the raw material adding pipe (307), and a discharge valve (309) is connected at one side of the bottom of the reaction tank (1).

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