CN213113164U

CN213113164U - Benzoic acid continuous production device

Info

Publication number: CN213113164U
Application number: CN202022152289.2U
Authority: CN
Inventors: 赵寒松
Original assignee: Liaoning Huayi Chemical Industry & Commerce Co ltd
Current assignee: Liaoning Huayi Chemical Industry & Commerce Co ltd
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2021-05-04
Anticipated expiration: 2030-09-27

Abstract

The utility model discloses a benzoic acid continuous production device, including hot melt cauldron, first circulating pump, cooling tank, liquid storage pot and second circulating pump, the hot melt cauldron top is fixed thick material mouth and the feed liquor mouth of being equipped with respectively, the first row of material pipe of hot melt cauldron bottom fixedly connected with and second row of material pipe, be equipped with first solenoid valve on the first row of material pipe. This benzoic acid continuous production device is used for preparing benzoic acid hot saturated solution through setting up the hot melt cauldron, carry hot saturated solution in the knockout drum through first circulating pump, realize the solid-liquid separation to hot saturated solution through filtering the body, and carry out the cooling action through cooling tank and multiunit ring pipe to the liquid after the separation, thereby carry the hot melt cauldron again through second circulating pump and the liquid after with the cooling of second circulating pipe in, this benzoic acid continuous production device can carry out continuous production to benzoic acid, be convenient for collect the benzoic acid crystallization through filtering the body, the practicality is high.

Description

Benzoic acid continuous production device

Technical Field

The utility model relates to a benzoic acid preparation technical field specifically is a benzoic acid continuous production device.

Background

Benzoic acid is a flaky or acicular crystal with the odor of benzene or formaldehyde, of the formula C6H5 COOH. Melting point 122.13 ℃, boiling point 249 ℃, relative density 1.2659(15/4 ℃). It can be sublimated rapidly at 100 deg.C, and its vapor has strong irritation and is easy to cause cough after inhalation. Slightly soluble in water and easily soluble in organic solvents such as ethanol and diethyl ether. Benzoic acid is a weak acid, stronger than fatty acids. They are chemically similar and can form salts, esters, acid halides, amides, anhydrides, etc., all of which are not readily oxidized. Electrophilic substitution reaction can occur on the benzene ring of benzoic acid, and a meta-substitution product is mainly obtained.

Benzoic acid is generally prepared in four steps, 1, by forming a crude benzoic acid into a hot saturated solution. 2. The insoluble impurities were removed by filtration while hot. 3. Slowly cooling for crystallization, and filtering out crystals. 4. The crystals were washed. However, in the prior art, since the cost of crude benzoic acid is very low, enterprises generally purchase crude benzoic acid to purify the crude benzoic acid to obtain benzoic acid with higher purity. When the purity of the benzoic acid is up to more than 99%, the purification process becomes quite complex, the amount of waste water is very large, the variety of byproducts is also great, a large amount of work is increased in subsequent waste gas and waste liquid treatment, the pressure of waste water treatment is very large, and in addition, when the benzoic acid is continuously produced, the precipitated benzoic acid crystals are inconvenient to collect.

The circulating type benzoic acid purifying device disclosed in the prior art, application number CN201920568222.1, realizes the purification and preparation of benzoic acid by easily circulating crude benzoic acid between a hot melting kettle and an active filter until the crude benzoic acid solution has a purity meeting the standard, but the circulating type benzoic acid purifying device is inconvenient for collecting benzoic acid crystals when in use, and a continuous benzoic acid producing device is designed aiming at the defects of the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a benzoic acid continuous production device to solve the problem of collecting the benzoic acid crystallization of being not convenient for among the prior art that proposes in the above-mentioned background art.

In order to achieve the above object, the present invention provides a continuous production device for benzoic acid, comprising a hot melting kettle, a first circulation pump, a cooling tank, a liquid storage tank and a second circulation pump, wherein the top of the hot melting kettle is respectively and fixedly provided with a coarse material port and a liquid material port, the bottom of the hot melting kettle is fixedly connected with a first discharging pipe and a second discharging pipe, the first discharging pipe is provided with a first electromagnetic valve, the second discharging pipe is provided with a second electromagnetic valve, the output end of the first circulation pump is communicated with the first circulation pipe, the end of the first circulation pipe, which is far away from the first circulation pump, is communicated with the separation tank, the top of the separation tank is internally connected with a sealing cover, the separation tank is internally provided with a filter body, the cooling tank is internally and fixedly provided with a ring pipe, the input end of the second circulation pump is communicated with the liquid storage tank through a pipeline, and the output, one end of the second circulating pipe, which is far away from the second circulating pump, is communicated with the top of the hot melting kettle.

Preferably, the input end of the first circulating pump is communicated with the first discharging pipe.

Preferably, the top of the separation tank is of an open structure, the surface of the sealing cover is provided with threads, and the inner wall surface of the top of the separation tank is provided with a thread groove meshed with the surface of the sealing cover.

Preferably, the filtering body is of a cylindrical structure, the top of the filtering body is of an open structure, the bottom of the filtering body is of a closed structure, and the joint of the first circulating pipe and the separating tank is located between the top surface of the filtering body and the bottom surface of the sealing cover.

Preferably, the length of the outer diameter of the filter body is matched with the length of the inner diameter of the separation tank.

Preferably, the annular pipe is regular annular array and is equipped with the multiunit, and both ends are all fixed to wear to locate in the cooling tank about the annular pipe, and the annular pipe top switch-on in the separation tank bottom, and the annular pipe bottom switch-on is in the liquid storage tank.

Compared with the prior art, the beneficial effects of the utility model are that: this benzoic acid continuous production device is used for preparing benzoic acid hot saturated solution through setting up the hot melt cauldron, carry hot saturated solution in the knockout drum through first circulating pump, realize the solid-liquid separation to hot saturated solution through filtering the body, and carry out the cooling action through cooling tank and multiunit ring pipe to the liquid after the separation, thereby carry the hot melt cauldron again through second circulating pump and the liquid after with the cooling of second circulating pipe in, this benzoic acid continuous production device can carry out continuous production to benzoic acid, be convenient for collect the benzoic acid crystallization through filtering the body, the practicality is high.

Drawings

FIG. 1 is a sectional view of the front structure of a continuous production apparatus for benzoic acid of the present invention;

FIG. 2 is a schematic view of the structure of a filter of the continuous production device for benzoic acid of the present invention;

FIG. 3 is a schematic view of the bottom structure of the separation tank of the continuous production device for benzoic acid.

In the figure: 1. the device comprises a hot melting kettle, 2, a coarse material port, 3, a liquid material port, 4, a first material discharging pipe, 5, a first electromagnetic valve, 6, a first circulating pump, 7, a first circulating pipe, 8, a separating tank, 9, a sealing cover, 10, a filtering body, 11, a cooling tank, 12, a ring pipe, 13, a liquid storage tank, 14, a second circulating pump, 15, a second circulating pipe, 16, a second material discharging pipe, 17 and a second electromagnetic valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a benzoic acid continuous production device comprises a hot melting kettle 1, a first circulating pump 6, a cooling tank 11, a liquid storage tank 13 and a second circulating pump 14, wherein a rough material port 2 and a liquid material port 3 are respectively fixedly arranged at the top of the hot melting kettle 1, a first discharging pipe 4 and a second discharging pipe 16 are fixedly connected at the bottom of the hot melting kettle 1, a first electromagnetic valve 5 is arranged on the first discharging pipe 4, a second electromagnetic valve 17 is arranged on the second discharging pipe 16, a first circulating pipe 7 is communicated with the output end of the first circulating pump 6, one end of the first circulating pipe 7, far away from the first circulating pump 6, is communicated with a separating tank 8, the input end of the first circulating pump 6 is communicated with the first discharging pipe 4, so that benzoic acid saturated solution in the hot melting kettle 1 can be conveyed into the separating tank 8 through the first circulating pump 6 and the first circulating pipe 7, a sealing cover 9 is connected in the top of the separating tank 8, a filter body 10 is arranged in the separating tank 8, the, the surface of the sealing cover 9 is provided with threads, the inner wall surface of the top of the separating tank 8 is provided with a thread groove meshed with the surface of the sealing cover 9, the sealing cover 9 is used for sealing the top of the separating tank 8, the filtering body 10 is convenient to take out through the sealing cover 9, the filtering body 10 is of a cylindrical structure, the top of the filtering body 10 is of an open structure, the bottom of the filtering body 10 is of a closed structure, the joint of the first circulating pipe 7 and the separating tank 8 is positioned between the top surface of the filtering body 10 and the bottom surface of the sealing cover 9, the length of the outer diameter of the filtering body 10 is matched with the length of the inner diameter of the separating tank 8, so that a saturated solution of benzoic acid can be filtered through the filtering body 10, the filtering body 10 can block the benzoic acid crystals through liquid, the benzoic acid crystals can be stored in the filtering body 10, the annular pipes 12 are fixedly arranged in the cooling tank 11, the annular pipes 12 are arranged in a regular annular array and are provided, and the top of the annular pipe 12 is communicated with the bottom of the separation tank 8, the bottom of the annular pipe 12 is communicated with the liquid storage tank 13, the cooling tank 11 is provided with a corresponding cooling water inlet, cooling water can be stored in the cooling tank 11, so that the liquid in the annular pipe 12 can be cooled, the input end of the second circulating pump 14 is communicated with the liquid storage tank 13 through a pipeline, the output end of the second circulating pump 14 is communicated with a second circulating pipe 15, and one end of the second circulating pipe 15, which is far away from the second circulating pump 14, is communicated with the top of the hot melting kettle 1.

The working principle is as follows: when the benzoic acid continuous production device is used, the first electromagnetic valve 5 and the second electromagnetic valve 17 are closed firstly, crude benzoic acid solid preparation raw materials are put into the hot melting kettle 1 through the crude port 2, purified water is conveyed into the hot melting kettle 1 through the liquid port 3, the raw materials in the hot melting kettle 1 are prepared into benzoic acid saturated solution in a heating state, then the first electromagnetic valve 5 is opened, the benzoic acid saturated solution is conveyed into the separation tank 8 through the first circulating pump 6, the first circulating pipe 7 and the first discharging pipe 4, the benzoic acid saturated solution is filtered under the action of the filter 10 in the separation tank 8, benzoic acid crystals are collected through the filter 10, the filtered liquid enters the multiple groups of annular pipes 12, the liquid in the annular pipes 12 is cooled through the cooling tank 11, and the cooled liquid enters the liquid storage tank 13, carry the liquid in the liquid storage pot 13 in the hot melt cauldron 1 again through second circulating pump 14, second circulating pipe 15 to the staff can open second solenoid valve 17, close first solenoid valve 5, thereby arrange the pipe 16 through the second and collect the processing to the solution in the hot melt cauldron 1, and the accessible is opened closing cap 9 and is taken out filtering body 10, thereby cool off the rinsing to the benzoic acid crystal in filtering body 10, and then can obtain the product after the benzoic acid purification, above be this benzoic acid continuous production device working process.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a benzoic acid continuous production device, includes hot melt kettle (1), first circulating pump (6), cooling tank (11), liquid storage pot (13) and second circulating pump (14), hot melt kettle (1) top is fixed respectively and is equipped with coarse fodder mouth (2) and feed liquor mouth (3), its characterized in that: the bottom of the hot melting kettle (1) is fixedly connected with a first discharging pipe (4) and a second discharging pipe (16), a first electromagnetic valve (5) is arranged on the first discharging pipe (4), a second electromagnetic valve (17) is arranged on the second discharging pipe (16), the output end of the first circulating pump (6) is communicated with a first circulating pipe (7), one end of the first circulating pipe (7) far away from the first circulating pump (6) is communicated with the inside of a separating tank (8), the top of the separating tank (8) is internally connected with a sealing cover (9), a filtering body (10) is arranged in the separating tank (8), an annular pipe (12) is fixedly arranged in the cooling tank (11), the input end of the second circulating pump (14) is communicated with the liquid storage tank (13) through a pipeline, and the output end of the second circulating pump (14) is communicated with a second circulating pipe (15), one end of the second circulating pipe (15) far away from the second circulating pump (14) is communicated with the top of the hot melting kettle (1).

2. The continuous production device of benzoic acid according to claim 1, characterized in that: the input end of the first circulating pump (6) is communicated with the first discharging pipe (4).

3. The continuous production device of benzoic acid according to claim 1, characterized in that: the top of the separation tank (8) is of an opening structure, the surface of the sealing cover (9) is provided with threads, and the inner wall surface of the top of the separation tank (8) is provided with a thread groove meshed with the surface of the sealing cover (9).

4. The continuous production device of benzoic acid according to claim 1, characterized in that: the filtering body (10) is of a cylindrical structure, the top of the filtering body (10) is of an open structure, the bottom of the filtering body (10) is of a closed structure, and the joint of the first circulating pipe (7) and the separating tank (8) is positioned between the top surface of the filtering body (10) and the bottom surface of the sealing cover (9).

5. The continuous production device of benzoic acid according to claim 1, characterized in that: the length of the outer diameter of the filter body (10) is matched with the length of the inner diameter of the separating tank (8).

6. The continuous production device of benzoic acid according to claim 1, characterized in that: the annular pipe (12) is provided with a plurality of groups in a regular annular array, the upper end and the lower end of the annular pipe (12) are fixedly arranged in the cooling tank (11), the top of the annular pipe (12) is communicated with the bottom of the separating tank (8), and the bottom of the annular pipe (12) is communicated with the liquid storage tank (13).