Nitrification kettle for producing pendimethalin

Abstract

The utility model discloses a nitration kettle for producing pendimethalin, which comprises a nitration kettle body, support legs fixed at four corners of the outer wall of the bottom of the nitration kettle body, a feed pipe connected to the inner wall of the top of the nitration kettle body, a discharge pipe connected to the inner wall of the bottom of the nitration kettle body, and a cooling cavity arranged in the nitration kettle body, a water inlet pipe is connected below the inner wall of one side of the cooling cavity, and a water outlet pipe is connected above the inner wall of the other side of the cooling cavity. According to the nitration kettle for pendimethalin production, water can be fed into the cooling cavity through the water inlet pipe in the reaction process, reactants, close to the inner wall, in the nitration kettle body are cooled, meanwhile, water is injected into the stirring assembly through the water supply pipe, the stirring assembly serves as a heat conductor, and therefore heat dissipation is achieved. Heat of reactants in the middle of the nitration kettle body is transferred to water in the stirring assembly, heat dissipation is carried out on the reactants in the middle of the nitration kettle body, and the overall heat dissipation effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrating kettles, in particular to a nitrating kettle for the production of pendimethalin. Background Technique

[0002] Pendimethalin is a dinitroaniline herbicide, which is suitable for annual gramineous weeds and some broad-leaved weeds. Due to its good effect, low toxicity and good safety, it has been widely promoted and applied. At present, the production process of pendimethalin uses 3,4-dimethylaniline as raw material, alkylates with 3-pentanone to form N-(3-pentyl)-3,4-dimethylaniline (abbreviated as "pentylamine"), and then is nitrated and post-treated to obtain the product pendimethalin, and its nitration reaction is carried out in a nitrating kettle.

[0003] The nitration reaction is a typical fast and strong exothermic reaction, and a large amount of heat will be released during the reaction process. If heat dissipation cannot be carried out in time, it may lead to too high reaction temperature, which will further aggravate side reactions and decomposition of products, and even cause safety accidents. Therefore, when carrying out the nitration reaction, cooling coils are usually arranged outside the nitrating kettle, and the heat is carried away by the flow of water in the coils. However, this can only make the reactants close to the inner wall of the nitrating kettle get more effective heat dissipation, and the reactants in the middle of the nitrating kettle are difficult to get effective heat dissipation, and the heat dissipation effect is general. Content of the Utility Model

[0004] The purpose of the utility model is to provide a nitrating kettle for the production of pendimethalin, so as to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A nitrating kettle for the production of pendimethalin, comprising: a nitrating kettle body, support legs fixed at the four corners of the outer wall of the bottom of the nitrating kettle body, a feed pipe connected to the inner wall of the top of the nitrating kettle body, and a discharge pipe connected to the inner wall of the bottom of the nitrating kettle body. It further comprises: a cooling cavity arranged in the kettle body of the nitrating kettle body, a water inlet pipe is connected to the lower part of one inner wall of the cooling cavity, and a water outlet pipe is connected to the upper part of the other inner wall of the cooling cavity. A stirring assembly is rotatably installed on the outer wall of the top of the nitrating kettle body, and a water supply pipe is rotatably connected to the top end of the stirring assembly. A water pumping assembly is installed on the outer wall of the top of the nitrating kettle body, and a motor is installed on one outer wall of the nitrating kettle body. A transmission assembly is installed on the output shaft of the motor, and the output shaft of the motor is in transmission connection with the stirring assembly through the transmission assembly.

[0006] The stirring assembly includes a hollow rotating roller, a plurality of equally spaced first stirring blades inserted on one outer wall of the hollow rotating roller, and a plurality of equally spaced second stirring blades inserted on the other outer wall of the hollow rotating roller.

[0007] The pumping assembly includes a mounting plate, a water pump mounted on the top of the mounting plate, a water suction pipe connected to the water inlet end of the water pump, and a drain pipe connected to the water outlet end of the water pump.

[0008] The transmission assembly includes a driving wheel sleeved on the output shaft of the motor, a driven wheel sleeved on the upper part of the outer wall of the hollow rotating roller, and a belt connected to the driving wheel and the driven wheel.

[0009] The bottom of the water suction pipe extends into the hollow rotating roller.

[0010] The bottom end of the water supply pipe is connected to the inner wall of the top of the hollow rotating roller through a bearing.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] In the nitrating kettle for the production of pendimethalin of the present utility model, during the reaction process, water can be introduced into the cooling cavity through the water inlet pipe to dissipate heat from the reactants in a circle near the inner wall of the nitrating kettle body. At the same time, water is poured into the stirring assembly through the water supply pipe. Through the stirring assembly itself as a heat conductor, the heat of the reactants in the middle of the nitrating kettle body is transferred to the water in the stirring assembly to dissipate heat from the reactants in the middle of the nitrating kettle body, and the overall heat dissipation effect is good. Description of the Drawings

[0013] Figure 1 is a sectional view structure diagram of the present utility model;

[0014] Figure 2 is a front view structure diagram of the present utility model;

[0015] Figure 3 is a rear view structure diagram of the present utility model;

[0016] Figure 4 is a structure diagram of the stirring assembly of the present utility model;

[0017] Figure 5 is a structure diagram of the pumping assembly of the present utility model;

[0018] Figure 6 is a structure diagram of the transmission assembly of the present utility model.

[0019] In the figure: 1, nitrating kettle body; 2, support leg; 3, feed pipe; 4, discharge pipe; 5, cooling cavity; 6, water inlet pipe; 7, water outlet pipe; 8, stirring assembly; 801, hollow rotating roller; 802, first stirring blade; 803, second stirring blade; 9, water supply pipe; 10, pumping assembly; 1001, mounting plate; 1002, water pump; 1003, water suction pipe; 1004, drain pipe; 11, motor; 12, transmission assembly; 1201, driving wheel; 1202, driven wheel; 1203, belt. Detailed Embodiments

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figure 1-6 , a nitrating kettle for the production of pendimethalin provided by the present utility model includes: a nitrating kettle body 1, support legs 2 fixed to the four corners of the outer wall of the bottom of the nitrating kettle body 1, a feed pipe 3 connected to the inner wall of the top of the nitrating kettle body 1, and a discharge pipe 4 connected to the inner wall of the bottom of the nitrating kettle body 1. It further includes: a cooling cavity 5 arranged inside the kettle body of the nitrating kettle body 1, a water inlet pipe 6 connected to the lower part of one inner wall of the cooling cavity 5, and a water outlet pipe 7 connected to the upper part of the other inner wall of the cooling cavity 5. A stirring assembly 8 is rotatably installed on the outer wall of the top of the nitrating kettle body 1, and a water supply pipe 9 is rotatably connected to the top end of the stirring assembly 8. A water pumping assembly 10 is installed on the outer wall of the top of the nitrating kettle body 1, and a motor 11 is installed on one outer wall of the nitrating kettle body 1. A transmission assembly 12 is installed on the output shaft of the motor 11, and the output shaft of the motor 11 is in transmission connection with the stirring assembly 8 through the transmission assembly 12.

[0022] It should be noted here that: the reaction raw materials can be put into the nitrating kettle body 1 through the feed pipe 3 for nitration reaction. The motor 11 can drive the stirring assembly 8 to rotate under the action of the transmission assembly 12 to mix the raw materials. A large amount of heat will be generated during the reaction process. At this time, water can be introduced into the cooling cavity 5 through the water inlet pipe 6, and when the water in the cooling cavity 5 is almost full, it is discharged through the water outlet pipe 7, so that the water in the cooling cavity 5 is always in a state of replacement, realizing heat dissipation by flowing water, and dissipating heat from the reactants in a circle along the inner wall of the nitrating kettle body 1. At the same time, water is poured into the inside of the stirring assembly 8 through the water supply pipe 9. The stirring assembly 8 itself serves as a heat conductor to transfer the heat of the reactants in the middle of the nitrating kettle body 1 to the water in the stirring assembly 8. When the water in the stirring assembly 8 is almost full, the water in the stirring assembly 8 is pumped outwards through the water pumping assembly 10, so that the water in the stirring assembly 8 is always in a state of replacement, realizing heat dissipation by flowing water, and dissipating heat from the reactants in the middle of the nitrating kettle body 1. The overall heat dissipation effect is good.

[0023] In a preferred embodiment, the stirring assembly 8 includes a hollow rotating roller 801, a plurality of equally spaced first stirring blades 802 inserted on one outer wall of the hollow rotating roller 801, and a plurality of equally spaced second stirring blades 803 inserted on the other outer wall of the hollow rotating roller 801.

[0024] It should be noted here that: The motor 11 drives the hollow roller 801 to rotate under the action of the transmission assembly 12, and then drives the first stirring blade 802 and the second stirring blade 803 to rotate, so as to mix the reaction raw materials and improve the reaction efficiency.

[0025] In a preferred embodiment, the water pumping assembly 10 includes a mounting plate 1001, a water pump 1002 mounted on the top of the mounting plate 1001, a water suction pipe 1003 connected to the water inlet end of the water pump 1002, and a drain pipe 1004 connected to the water outlet end of the water pump 1002.

[0026] It should be noted here that: The water supply pipe 9 fills water into the hollow roller 801. When the water is almost full, the water pump 1002 can pump the water inside the hollow roller 801 out through the water suction pipe 1003. At the same time, the water supply pipe 9 continues to supply water to the inside of the hollow roller 801, so that the water inside the hollow roller 801 is always in a flowing and replacing state, which can continuously take away heat.

[0027] In a preferred embodiment, the transmission assembly 12 includes a driving wheel 1201 sleeved on the output shaft of the motor 11, a driven wheel 1202 sleeved on the upper outer wall of the hollow roller 801, and a belt 1203 connecting the driving wheel 1201 and the driven wheel 1202.

[0028] It should be noted here that: The motor 11 can drive the driving wheel 1201 to rotate, and then drive the driving wheel 1201 to rotate, and then drive the belt 1203 and the driven wheel 1202 to rotate, and then drive the hollow roller 801 to rotate.

[0029] In a preferred embodiment, the bottom of the water suction pipe 1003 extends into the hollow roller 801.

[0030] It should be noted here that: It is convenient for the water pump 1002 to pump the water inside the hollow roller 801 out.

[0031] In a preferred embodiment, the bottom end of the water supply pipe 9 is connected to the inner wall of the top of the hollow roller 801 through a bearing.

[0032] It should be noted here that: The rotation of the hollow roller 801 does not affect the water supply pipe 9.

[0033] Working principle: The reaction raw materials can be put into the nitration kettle body 1 through the feed pipe 3 for nitration reaction. The motor 11 can drive the driving wheel 1201 to rotate, and then drive the driving wheel 1201 to rotate, and then drive the belt 1203 and the driven wheel 1202 to rotate, and then drive the hollow rotating roller 801 to rotate, and then drive the first stirring blade 802 and the second stirring blade 803 to rotate, so as to mix the reaction raw materials and improve the reaction efficiency. A large amount of heat will be generated during the reaction. At this time, water can be introduced into the cooling cavity 5 through the water inlet pipe 6. When the water in the cooling cavity 5 is almost full, it is discharged through the water outlet pipe 7, so that the water in the cooling cavity 5 is always in a state of replacement, realizing heat dissipation by flowing water, dissipating heat from the reactants in a circle close to the inner wall of the nitration kettle body 1. At the same time, water is poured into the hollow rotating roller 801 through the water supply pipe 9. Through the hollow rotating roller 801, the first stirring blade 802 and the second stirring blade 803 themselves as heat conductors, the heat of the reactants in the middle of the nitration kettle body 1 is transferred to the water in the hollow rotating roller 801. When the water is almost full, the water in the hollow rotating roller 801 can be pumped outwards through the water pump 1002 through the water extraction pipe 1003. At the same time, the water supply pipe 9 also continues to supply water to the hollow rotating roller 801, realizing that the water in the hollow rotating roller 801 is always in a state of flowing replacement, continuously taking away heat and dissipating heat from the reactants in the middle of the nitration kettle body 1. The overall heat dissipation effect is good.

[0034] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A nitration kettle for producing pendimethalin, comprising: A nitration kettle body (1), support legs (2) fixed to the four corners of the bottom outer wall of the nitration kettle body (1), a feed pipe (3) connected to the top inner wall of the nitration kettle body (1), and a discharge pipe (4) connected to the bottom inner wall of the nitration kettle body (1); The invention is characterized in that it also comprises: a cooling chamber (5) arranged in the kettle body of the nitrification kettle body (1); a water inlet pipe (6) is connected to the lower part of the inner wall of one side of the cooling chamber (5); and a water outlet pipe (7) is connected to the upper part of the inner wall of the other side of the cooling chamber (5); a stirring assembly (8) is rotatably mounted on the outer wall of the top of the nitrification kettle body (1); and a water supply pipe (9) is rotatably connected to the top of the stirring assembly (8); a water pumping assembly (10) is mounted on the outer wall of the top of the nitrification kettle body (1); and a motor (11) is mounted on the outer wall of one side of the nitrification kettle body (1); a transmission assembly (12) is mounted on the output shaft of the motor (11); and the output shaft of the motor (11) is transmission-connected to the stirring assembly (8) through the transmission assembly (12).

2. The nitrification kettle for pendimethalin production according to claim 1, characterized in that: The stirring assembly (8) comprises a hollow roller (801), a plurality of first stirring blades (802) inserted into the outer wall of one side of the hollow roller (801) and distributed at equal intervals, and a plurality of second stirring blades (803) inserted into the outer wall of the other side of the hollow roller (801) and distributed at equal intervals.

3. The nitrification kettle for producing pendimethalin according to claim 2, characterized in that: The water pumping assembly (10) comprises a mounting plate (1001), a water pump (1002) mounted on the top of the mounting plate (1001), a water pumping pipe (1003) connected to the water inlet end of the water pump (1002), and a drainage pipe (1004) connected to the water outlet end of the water pump (1002).

4. The nitrification kettle for pendimethalin production according to claim 2, characterized in that: The transmission assembly (12) comprises a driving wheel (1201) sleeved on the output shaft of the motor (11), a driven wheel (1202) sleeved on the upper part of the outer wall of the hollow roller (801), and a belt (1203) connected to the driving wheel (1201) and the driven wheel (1202).

5. The nitrification kettle for pendimethalin production according to claim 3, characterized in that: The bottom of the water pumping pipe (1003) extends into the hollow roller (801).

6. The nitrification kettle for pendimethalin production according to claim 2, characterized in that: The bottom end of the water supply pipe (9) is connected to the inner wall of the top of the hollow roller (801) via a bearing.

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