A dropping device for preparing o-tolyl isocyanate

Abstract

The utility model provides a dropping device for preparing o-tolyl isocyanate, which relates to the technical field of o-tolyl isocyanate preparation, and comprises a dropping tank and a reactor, wherein a dropping tube is arranged between the dropping tank and the reactor, a flow regulating valve is arranged on the dropping tube, support plates are arranged on both sides of the top of the reactor, a driving motor is arranged on the outer wall of the support plate on the right side, a camshaft is arranged between the support plates, a connecting rod is arranged on the camshaft sleeve and partially extends to the inside of the reactor, and a stirring component is arranged at the bottom of the connecting rod and is located inside the reactor.

Description

Technical Field

[0001] The utility model relates to the technical field of preparation of o-tolyl isocyanate, in particular to a dropping device for preparing o-tolyl isocyanate. Background Art

[0002] As an important raw material in the chemical industry, o-methylphenyl isocyanate is widely used as an intermediate in organic synthesis for the preparation of other compounds, such as polyurethanes and dyes. It is also used to prepare coatings, adhesives, plastics, elastomers and other products. It has a wide range of applications in many fields. When preparing o-methylphenyl isocyanate, the relevant reaction liquid is added into the reactor through a dropping tank to react with the liquid reagent in the reactor.

[0003] The existing dropping tank drips the reaction liquid by manually opening the control valve, but the different opening degrees of the control valve lead to different flow rates of the reaction liquid, so the amount of the reaction liquid cannot be guaranteed. Too much or too little reaction liquid affects the preparation of o-toluene isocyanate, and the reaction liquid is generally directly transported into the reactor and added to the reactor in the form of drops. However, this easily causes uneven dispersion of the dripping reaction liquid and excessive local concentration, which easily leads to increased side reactions and affects product quality. Therefore, we propose a dropping device for preparing o-toluene isocyanate. Utility Model Content

[0004] The purpose of the present utility model is to provide a utility model subject to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A dropping device for preparing o-tolyl isocyanate comprises a dropping tank and a reactor, a dropping tube is arranged between the dropping tank and the reactor, a flow regulating valve is arranged on the dropping tube, support plates are arranged on both sides of the top of the reactor, a driving motor is arranged on the outer wall of the support plate on the right side, a camshaft is arranged between the support plates, the camshaft sleeve is provided with a connecting rod and partially extends into the reactor, and a stirring assembly is arranged at the bottom of the connecting rod and is located inside the reactor.

[0007] As a preferred solution of the present invention, a liquid level meter is provided on the outside of the dripping tank.

[0008] The technical effect of adopting the above further solution is that the liquid level inside the drip tank can be observed from the outside through the liquid level meter.

[0009] As a preferred solution of the utility model, the stirring assembly includes a protective shell, a stirring motor is arranged inside the protective shell, and a stirring rod is arranged at the bottom of the protective shell.

[0010] As a preferred solution of the utility model, the bottom output end of the stirring motor is connected to the stirring rod.

[0011] The technical effect of adopting the above further solution is: the stirring motor drives the stirring rod to rotate, and the liquid and reaction liquid inside the reactor are stirred to make them evenly mixed.

[0012] As a preferred solution of the utility model, a controller for controlling various electrical components is installed on the periphery of the reactor near the top.

[0013] As a preferred solution of the utility model, a switch valve is arranged on the periphery of the reaction kettle near the bottom.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. In the utility model, a dripping tube is connected between the dripping tank and the reactor, and a flow regulating valve is arranged on the dripping tube to more accurately adjust the dripping rate of the dripping reaction liquid.

[0016] 2. In the utility model, a stirring assembly is arranged inside the reactor to stir the internal liquid and the added reaction liquid to make them fully and evenly mixed. At the same time, the stirring assembly is driven by the camshaft and the connecting rod, and the driving motor on the outer side of the support plate works to rotate the camshaft located between the support plates, driving the connecting rod sleeved on the camshaft to move back and forth up and down, and then the stirring assembly at the bottom of the connecting rod moves up and down in the reactor to stir the inside, thereby avoiding uneven dispersion of the added reaction liquid in the reactor and excessive local concentration, which leads to an increase in side reactions and further affects the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a dropping device for preparing o-tolyl isocyanate provided by the utility model;

[0018] Figure 2 A schematic diagram of a partial overall structure of a dropping device for preparing o-tolyl isocyanate provided by the utility model;

[0019] Figure 3 The utility model provides a schematic diagram of the internal structure of a reactor of a dropping device for preparing o-tolyl isocyanate.

[0020] Legend: 1. Dropping tank; 2. Reactor; 3. Dropping tube; 301. Flow control valve; 302. Liquid level meter; 4. Support plate; 401. Drive motor; 402. Camshaft; 403. Connecting rod; 5. Stirring assembly; 501. Protective shell; 502. Stirring motor; 503. Stirring rod; 6. Controller; 7. Switch valve. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant literature, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0025] Example 1

[0026] like Figure 1-3 As shown, the utility model provides a technical solution: a dropping device for preparing o-tolyl isocyanate, comprising a dropping tank 1 and a reactor 2, a dropping tube 3 is arranged between the dropping tank 1 and the reactor 2, a flow regulating valve 301 is arranged on the dropping tube 3, for more accurately adjusting the dripping rate of the dripping reaction liquid, a liquid level meter 302 is arranged on the outside of the dropping tank 1, and the liquid level inside the dropping tank 1 can be observed from the outside through the liquid level meter 302, a controller 6 for controlling various electrical components is installed on the outside of the reactor 2 near the top, which is convenient for workers to use during operation, and a switch valve 7 is arranged on the outside of the reactor 2 near the bottom to guide the internal liquid out of the outside.

[0027] Example 2

[0028] like Figure 1-3As shown, a dropping device for preparing o-tolyl isocyanate is provided, support plates 4 are provided on both sides of the top of the reactor 2, a driving motor 401 is provided on the outer wall of the right support plate 4, a camshaft 402 is provided between the support plates 4, the camshaft 402 is sleeved with a connecting rod 403 and partially extends into the reactor 2, a stirring assembly 5 is provided at the bottom of the connecting rod 403 and is located inside the reactor 2, and the camshaft 402 located between the support plates 4 is rotated by driving the motor 401 outside the support plate 4, driving the camshaft sleeved on the camshaft The connecting rod 403 on 402 reciprocates up and down, and then the stirring assembly 5 at the bottom of the connecting rod 403 moves up and down in the reactor 2. The stirring assembly 5 includes a protective shell 501, a stirring motor 502 is arranged inside the protective shell 501, and a stirring rod 503 is arranged at the bottom of the protective shell 501. The bottom output end of the stirring motor 502 is connected to the stirring rod 503. The stirring motor 502 works to drive the stirring rod 503 to rotate, so as to stir the liquid and reaction liquid inside the reactor 2 to make them mixed evenly.

[0029] The working process of the utility model is as follows: when using a dropping device for preparing o-tolyl isocyanate, a dropping tube 3 is connected between the dropping tank 1 and the reactor 2, and a flow regulating valve 301 is arranged on the dropping tube 3 to more accurately adjust the dripping rate of the dripping reaction liquid, support plates 4 are arranged on both sides of the top of the reactor 2, a driving motor 401 is arranged on the outer wall of the right support plate 4, a camshaft 402 is arranged between the support plates 4, a connecting rod 403 is sleeved on the camshaft 402 and partially extends into the reactor 2, a stirring assembly 5 is arranged at the bottom of the connecting rod 403 and is located inside the reactor 2, the stirring assembly 5 includes a protective shell 501, a stirring motor 502 is arranged inside the protective shell 501, a stirring rod 503 is arranged at the bottom of the protective shell 501, and a stirring The bottom output end of the motor 502 is connected to the stirring rod 503. When the stirring motor 502 works, the stirring rod 503 is driven to rotate, and the liquid and the reaction liquid inside the reactor 2 are stirred to make them mixed evenly. At the same time, the stirring component 5 is driven by the camshaft 402 and the connecting rod 403, and the driving motor 401 outside the support plate 4 works, so that the camshaft 402 located between the support plates 4 rotates, and the connecting rod 403 mounted on the camshaft 402 moves up and down reciprocatingly, and then the stirring component 5 at the bottom of the connecting rod 403 moves up and down in the reactor 2 to stir the inside, so as to avoid uneven dispersion of the reaction liquid added in the reactor 2 and excessive local concentration, which leads to an increase in side reactions and affects the product quality.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dropping device for preparing o-tolyl isocyanate, comprising a dropping tank (1) and a reaction kettle (2), characterized in that: A dripping tube (3) is arranged between the dripping tank (1) and the reactor (2), and a flow regulating valve (301) is arranged on the dripping tube (3). Support plates (4) are arranged on both sides of the top of the reactor (2), and a driving motor (401) is arranged on the outer wall of the right support plate (4). A camshaft (402) is arranged between the support plates (4), and the camshaft (402) is sleeved with a connecting rod (403) and partially extends into the interior of the reactor (2). A stirring assembly (5) is arranged at the bottom of the connecting rod (403) and is located inside the reactor (2).

2. A dropping device for preparing o-tolyl isocyanate according to claim 1, characterized in that: A liquid level meter (302) is arranged on the outside of the dripping tank (1).

3. A dropping device for preparing o-tolyl isocyanate according to claim 1, characterized in that: The stirring assembly (5) comprises a protective shell (501), a stirring motor (502) is arranged inside the protective shell (501), and a stirring rod (503) is arranged at the bottom of the protective shell (501).

4. A dropping device for preparing o-tolyl isocyanate according to claim 3, characterized in that: The bottom output end of the stirring motor (502) is connected to the stirring rod (503).

5. A dropping device for preparing o-tolyl isocyanate according to claim 1, characterized in that: A controller (6) for controlling various electrical components is installed on the top of the outer periphery of the reaction kettle (2).

6. A dropping device for preparing o-tolyl isocyanate according to claim 1, characterized in that: An on-off valve (7) is arranged on the periphery of the reaction kettle (2) near the bottom.

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