Nitrogen interlocking protection device used in pesticide production process

Abstract

The utility model discloses a nitrogen interlocking protection device used in the pesticide production process. The nitrogen interlocking protection device comprises a reaction kettle used for pesticide production and a nitrogen replacement pipeline arranged on the right side of the top of the reaction kettle. According to the utility model, nitrogen participates in oxygen stirring reaction so as to prevent dangerous conditions such as oxidation, combustion and even explosion of materials during pesticide production, and the conventional single stirring structure is changed, so that reactants such as nitrogen and oxygen are uniformly mixed through rotary stirring of the stirring paddle; the stirring paddle can rotate and stir during up-down movement, so that the stirring range and the stirring area of the stirring paddle are enlarged, the contact range of nitrogen participating in oxygen reaction is enlarged, and the nitrogen is ensured to be more sufficient in the reaction; therefore, dangerous conditions such as oxidation, combustion and even explosion of materials can be better prevented in pesticide production and use, and a better nitrogen interlocking protection effect in the pesticide production process is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a technical field of pesticide production especially relates to a nitrogen interlock protection device for pesticide production process. BACKGROUND

[0002] In the pesticide production process, often involves flammable and explosive organic solvents. Intermittent reaction kettle, after discharging material, the space in the kettle will be connected by the reverse filling of tail gas pipe air, when the flammable and explosive material is put in again, the saturated steam of the material will form explosive mixture with the above-mentioned air, once meets the static electricity type ignition source, then will cause the fire and explosion accident, brings certain safety risk to chemical production. Therefore, when using the intermittent kettle type reactor, in order to avoid the breathing effect of material putting to bring the air in the tail gas system into the reaction kettle reversely, makes the reaction kettle full of nitrogen before feeding, to ensure that the oxygen content in the reaction kettle reaches the safety range.

[0003] Often use nitrogen interlock protection device for pesticide production process, its device mainly includes: nitrogen replacement pipeline, nitrogen flowmeter, nitrogen pressure transmitter, reaction kettle, venting pipeline, kettle bottom valve, feeding valve, material feeding pipe, oxygen content on-line detector, kettle pressure transmitter, chemical DCS control system. Its working principle, mainly through the use of pneumatic cut-off valve, cooperate nitrogen flowmeter, pressure transmitter, oxygen content on-line detector and other remote instruments, through the DCS sequence control program and interlock program, ensure that all materials enter the reaction kettle, the reaction kettle is replaced by nitrogen fully, makes the oxygen content in the reaction system within the safety allowable range.

[0004] Although in the pesticide production process, nitrogen interlock protection device is the key defense line of guaranteeing safety production, it can effectively avoid the impurities such as oxygen mixed into the reaction system, prevents the oxidation, combustion or even explosion of material and other dangerous situations, creates a stable environment for pesticide synthesis. However, in the prior art, in the process of nitrogen participating in oxygen reaction, due to the too simple stirring structure of the reaction kettle, it is difficult to promote the uniform and efficient mixing of nitrogen and other reactants (such as oxygen), leading to uneven dispersion of reaction materials, low effective collision frequency between molecules, resulting in low overall production efficiency, increases the time, manpower and material resources cost, and technical improvement is urgently needed to break through the bottleneck. Therefore, the utility model provides a nitrogen interlock protection device for pesticide production process. UTILITY MODEL CONTENT

[0005] The utility model aims at solving the shortcomings in the prior art, and provides a nitrogen interlock protection device for pesticide production process.

[0006] In order to achieve the above object, the utility model adopts the following technical scheme.

[0007] The utility model provides a nitrogen interlock protection device for pesticide production process, including the reaction kettle for pesticide production, the nitrogen replacement pipeline of reaction kettle top right side is provided with nitrogen flow meter and nitrogen pressure transmitter on nitrogen replacement pipeline, and is provided with the pressure transmitter in kettle, oxygen content on -line detection instrument, material feeding pipe, venting pipeline and chemical DCS control system respectively on reaction kettle, the top central fixed mounting of reaction kettle has driven box, the movable mounting of driven box has stirring rod, and the bottom end of stirring rod is movable and penetrates to the inside of reaction kettle and is fixedly installed with stirring paddle;

[0008] The driving box is movably installed with a lifting plate, the stirring motor is fixedly installed on the lifting plate, and the top end of the stirring rod is fixedly connected with the output shaft of the stirring motor; vertical tooth rods are fixedly connected on the lifting plate on both sides of the stirring motor, the top ends of the two tooth rods are movably penetrated above the driving box and are fixedly connected with the same connecting rod, tooth grooves are arranged on the two tooth rods, gears are engaged with the tooth grooves on the tooth rods, and step motors are arranged on both sides of the driving box.

[0009] Further, the lifting plate is provided with a mounting hole, a bearing is fixedly installed in the mounting hole, and the top end of the stirring rod is rotatably installed on the bearing.

[0010] Further, the top inner wall of the reaction kettle is fixedly installed with a sealing sliding sleeve, the stirring rod is sealingly and slidingly penetrated in the sealing sliding sleeve, and the stirring rod is simultaneously cooperated with the upward and downward movement and the rotary movement based on the sealing sliding sleeve.

[0011] Further, the top of the driving box is provided with a through groove, and the size of the stirring motor is matched with the size of the through groove.

[0012] Further, the lifting plate is provided with a mounting hole, a bearing is fixedly installed in the mounting hole, and the top end of the stirring rod is rotatably installed on the bearing.

[0013] Further, the top inner wall of the driving box is fixedly installed with a sealing sliding sleeve, the stirring rod is sealingly and slidingly penetrated in the sealing sliding sleeve, and the stirring rod is simultaneously cooperated with the upward and downward movement and the rotary movement based on the sealing sliding sleeve.

[0014] The utility model discloses a nitrogen interlock protection device for pesticide production process, including the reaction kettle for pesticide production, the nitrogen replacement pipeline of reaction kettle top right side is provided with nitrogen flow meter and nitrogen pressure transmitter on nitrogen replacement pipeline, and is provided with the pressure transmitter in kettle, oxygen content on -line detection instrument, material feeding pipe, venting pipeline and chemical DCS control system respectively on reaction kettle, the top central fixed mounting of reaction kettle has driven box, the movable mounting of driven box has stirring rod, and the bottom end of stirring rod is movable and penetrates to the inside of reaction kettle and is fixedly installed with stirring paddle;

[0015] In the utility model, not only nitrogen participates in oxygen stirring reaction, so as to prevent material oxidation, combustion or even explosion and other dangerous conditions during pesticide production, but also the previous single stirring structure is changed to ensure that nitrogen fully participates in oxygen reaction, so that the stirring motor drives the stirring rod and the stirring paddle to rotate and stir, so as to promote the uniform mixing of nitrogen and oxygen and other reactants.

[0016] The utility model discloses a structure is simple, and the nitrogen gas interlock protection device can be used to the nitrogen gas interlock protection of the pesticide production process, and the nitrogen gas interlock protection device comprises a reaction kettle, nitrogen gas replacement pipeline, nitrogen gas flowmeter, nitrogen gas pressure transmitter, kettle pressure transmitter, oxygen content on -line detection appearance, material feeding pipe, emptying pipeline, drive box, step motor, gear, toothed rod, tooth groove, through groove, guide sliding block, guide sliding slot, stirring rod, stirring paddle, lifting plate and stirring motor. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A structure diagram of the nitrogen gas interlock protection device for the pesticide production process is provided in the utility model.

[0018] Figure 2 The utility model discloses a structure is simple, and the nitrogen gas interlock protection device can be used to the nitrogen gas interlock protection of the pesticide production process, and the nitrogen gas interlock protection device comprises a reaction kettle, nitrogen gas replacement pipeline, nitrogen gas flowmeter, nitrogen gas pressure transmitter, kettle pressure transmitter, oxygen content on -line detection appearance, material feeding pipe, emptying pipeline, drive box, step motor, gear, toothed rod, tooth groove, through groove, guide sliding block, guide sliding slot, stirring rod, stirring paddle, lifting plate and stirring motor. Figure 1 The utility model discloses a structure is simple, and the nitrogen gas interlock protection device can be used to the nitrogen gas interlock protection of the pesticide production process, and the nitrogen gas interlock protection device comprises a reaction kettle, nitrogen gas replacement pipeline, nitrogen gas flowmeter, nitrogen gas pressure transmitter, kettle pressure transmitter, oxygen content on -line detection appearance, material feeding pipe, emptying pipeline, drive box, step motor, gear, toothed rod, tooth groove, through groove, guide sliding block, guide sliding slot, stirring rod, stirring paddle, lifting plate and stirring motor.

[0019] Figure 3 The utility model discloses a structure is simple, and the nitrogen gas interlock protection device can be used to the nitrogen gas interlock protection of the pesticide production process, and the nitrogen gas interlock protection device comprises a reaction kettle, nitrogen gas replacement pipeline, nitrogen gas flowmeter, nitrogen gas pressure transmitter, kettle pressure transmitter, oxygen content on -line detection appearance, material feeding pipe, emptying pipeline, drive box, step motor, gear, toothed rod, tooth groove, through groove, guide sliding block, guide sliding slot, stirring rod, stirring paddle, lifting plate and stirring motor.

[0020] In the drawing: 1, reaction kettle;2, nitrogen gas replacement pipeline;3, nitrogen gas flowmeter;4, nitrogen gas pressure transmitter;5, kettle pressure transmitter;6, oxygen content on -line detection appearance;7, material feeding pipe;8, emptying pipeline;9, drive box;901, step motor;902, gear;903, toothed rod;9031, tooth groove;904, through groove;905, guide sliding block;906, guide sliding slot;10, stirring rod;11, stirring paddle;12, lifting plate;13, stirring motor;14, sealing sliding sleeve;15, bearing;16, connecting rod. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0022] Reference Figures 1-3The utility model relates to a nitrogen interlock protection device for pesticide production process, including the reaction kettle 1 for pesticide production, the nitrogen replacement pipeline 2 of setting at the right side of reaction kettle 1 top, and the nitrogen flowmeter 3 and nitrogen pressure transmitter 4 of setting on nitrogen replacement pipeline 2, reaction kettle 1 still is provided with pressure transmitter 5 in kettle, oxygen content on -line detector 6, material feeding pipe 7, vent pipeline 8 and chemical DCS control system respectively, the top central fixed mounting of reaction kettle 1 has drive box 9, the movable mounting of drive box 9 has stirring rod 10, and the bottom end of stirring rod 10 moves through to reaction kettle 1 inside and is fixedly installed with stirring paddle 11;

[0023] The movable mounting of drive box 9 has lifting plate 12, and stirring motor 13 is fixedly installed on lifting plate 12, and the top end of stirring rod 10 is fixedly connected with the output shaft of stirring motor 13;The vertical tooth bar 903 is fixedly connected on the lifting plate 12 on both sides of stirring motor 13, and the top end of the two tooth bars 903 moves through to the upper of drive box 9 and is fixedly connected with the same connecting rod 16, the tooth groove 9031 is arranged on the two tooth bars 903, the gear 902 is engaged on the tooth bar 903 through the tooth groove 9031, and the output shaft of the step motor 901 is rotatably connected to the drive box 9 and is fixedly sleeved with the gear 902.

[0024] In the embodiment, the mounting hole is arranged on the lifting plate 12, the bearing 15 is fixedly installed in the mounting hole, and the top end of the stirring rod 10 is rotatably installed on the bearing 15;The sealing sliding sleeve 14 is fixedly installed on the inner wall of the top of the reaction kettle 1, the stirring rod 10 is sealingly and slidingly penetrated in the sealing sliding sleeve 14, and the stirring rod 10 is simultaneously cooperated with the upward and downward movement and the rotary movement based on the sealing sliding sleeve 14.

[0025] In the embodiment, the top of the drive box 9 is provided with a through slot 904, and the size of the stirring motor 13 is matched with the size of the through slot 904;The guide sliding block 905 is arranged on both sides of the lifting plate 12, and the guide sliding groove 906 is arranged on the inner wall of both sides of the drive box 9, and the guide sliding block 905 is slidingly installed in the guide sliding groove 906 in the vertical direction.

[0026] The vertical hole is further arranged on the inner wall of the top side of the drive box 9, and the tooth bar 903 moves through the vertical hole in the vertical direction.

[0027] As Figures 1-3The nitrogen interlocking protection device for pesticide production process is shown, in order to prevent the material from oxidation, combustion and even explosion and other dangerous conditions in the pesticide production, nitrogen is added to participate in the reaction with oxygen, and the single stirring structure in the past is changed to ensure that nitrogen fully participates in the reaction with oxygen, so that the nitrogen and oxygen and other reactants are uniformly mixed by the rotation and stirring of the stirring rod 10 and the stirring paddle 11 driven by the stirring motor 13, and the gear 902 is driven to rotate in the forward and reverse directions by the forward and reverse rotation of the stepping motor 901, the gear 902 is engaged with the tooth groove 9031 on the gear rod 903 to drive the gear rod 903 to move up and down, the gear rod 903 further drives the lifting plate 12, the bearing 15, the stirring rod 10 and the stirring paddle 11 to move up and down, so that the stirring paddle 11 rotates and stirs in the up and down movement, so as to increase the stirring range and stirring area of the stirring paddle 11, improve the contact range of nitrogen in the reaction with oxygen, cause the uniform dispersion of nitrogen in the reaction with oxygen, improve the effective collision frequency between molecules, improve the overall production efficiency, ensure that nitrogen is more fully reacted, and thus can better prevent the material from oxidation, combustion and even explosion and other dangerous conditions in the pesticide production, ensure that the nitrogen interlocking protection effect in the pesticide production process is better, and greatly meet the use requirements of the people.

[0028] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A nitrogen interlock protection device for pesticide production process, comprising a reaction vessel (1) for pesticide production, a nitrogen replacement pipe (2) installed on the right side of the top of the reaction vessel (1), a nitrogen flow meter (3) and a nitrogen pressure transmitter (4) installed on the nitrogen replacement pipe (2), and the reaction vessel (1) is also equipped with an in-vessel pressure transmitter (5), an online oxygen content detector (6), a material feed pipe (7), a vent pipe (8), and a chemical DCS control system; characterized in that, A drive box (9) is fixedly installed at the top center of the reactor (1). A stirring rod (10) is movably installed inside the drive box (9). The bottom end of the stirring rod (10) movably penetrates into the reactor (1) and is fixedly installed with a stirring paddle (11). A lifting plate (12) is movably installed inside the drive box (9). A stirring motor (13) is fixedly installed on the lifting plate (12). The top end of the stirring rod (10) is fixedly connected to the output shaft of the stirring motor (13). Vertically arranged racks (903) are fixedly connected to the lifting plates (12) on both sides of the stirring motor (13). The top ends of the two racks (903) movably extend to the top of the drive box (9) and are fixedly connected to the same connecting rod (16). The two racks (903) are provided with tooth grooves (9031). Gears (902) mesh with the racks (903) through the tooth grooves (9031). Stepper motors (901) are provided on both sides of the drive box (9). The output shaft of the stepper motor (901) rotates through the drive box (9) and is fixedly sleeved with the gear (902).

2. The nitrogen interlock protection device for pesticide production process according to claim 1, characterized in that, The lifting plate (12) is provided with mounting holes, and a bearing (15) is fixedly installed in the mounting holes. The top end of the stirring rod (10) is rotatably installed on the bearing (15).

3. A nitrogen interlock protection device for pesticide production process according to claim 1, characterized in that, A sealing sleeve (14) is fixedly installed on the top inner wall of the reactor (1). The stirring rod (10) slides through the sealing sleeve (14) in a sealed manner, and the stirring rod (10) moves up and down and rotates simultaneously within the sealing sleeve (14).

4. A nitrogen interlock protection device for pesticide production process according to claim 1, characterized in that, The top of the drive box (9) is provided with a through groove (904), and the size of the stirring motor (13) is adapted to the size of the through groove (904).

5. A nitrogen interlock protection device for pesticide production process according to claim 1, characterized in that, Guide sliders (905) are provided on both sides of the lifting plate (12), and guide grooves (906) are provided on the inner walls of both sides of the drive box (9). The guide sliders (905) are slidably installed in the guide grooves (906) in the vertical direction.

6. A nitrogen interlock protection device for pesticide production process according to claim 1, characterized in that, The drive box (9) is also provided with a vertical hole on the top inner wall, and the rack (903) moves through the vertical hole in the vertical direction.

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