CN217450103U - Vacuum concentration equipment is used in nitrochlorobenzene production - Google Patents

Abstract

The utility model belongs to the field of chemical equipment, in particular to vacuum concentration equipment for nitrochlorobenzene production, which comprises a tank body, the upper surface of the tank body is provided with a first feeding pipe, one side outside the tank body is provided with a vacuum pump, the shell of the tank body is of a double-layer structure, the upper surface of the tank body is also provided with a second feeding pipe, the output ends of the first feeding pipe and the second feeding pipe are communicated with the inner shell of the tank body, the input end of the vacuum pump is communicated with the output end of the tank inner shell through a pipeline IV, an acid absorption block is arranged in the vacuum pump, a water inlet pipe is arranged at the other side outside the tank body, a steam generator is arranged between the output end of the water inlet pipe and the input end of the tank body shell, the acid absorption block is used for absorbing acid mist formed by sulfuric acid, and water is converted into steam through the steam generator and enters the inner wall of the tank body to provide a heat source for the reaction in the tank body.

Description

Vacuum concentration equipment is used in nitrochlorobenzene production

Technical Field

The utility model relates to a chemical industry equipment technical field, concretely relates to vacuum concentration equipment is used in nitrochlorobenzene production.

Background

Chlorobenzene reacts with nitric acid in the presence of sulfuric acid to generate a nitrochlorobenzene mixture, concentrated materials and secondary steam enter a separator at a higher speed in a tangential direction under the induction of the secondary steam and the high-vacuum suction of the separator in vacuum concentration, and the concentration of a solution can be improved through vacuum concentration, so that the storage and the transportation are convenient;

in the prior art, referring to fig. 1, the production of nitrochlorobenzene is carried out by using a traditional ferrosilicon pot type normal pressure concentration process, but the pot type concentration process generates partial sulfur dioxide due to the decomposition of acid, generates acid mist to pollute the atmosphere and destroys the ecological environment of human beings.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a vacuum concentration equipment is used in nitrochlorobenzene production, the utility model aims to solve the technical problem as follows: the vacuum concentration equipment for producing nitrochlorobenzene can improve the concentration of sulfuric acid and reduce the generation of acid mist.

The purpose of the utility model can be realized by the following technical scheme:

a vacuum concentration device for nitrochlorobenzene production comprises a tank body, wherein a first feeding pipe is arranged on the upper surface of the tank body, a vacuum pump is arranged on one side outside the tank body, the shell of the tank body is of a double-layer structure, a feeding pipe II is also arranged on the upper surface of the tank body, the output ends of the first feeding pipe and the second feeding pipe are both communicated with the tank inner shell, the input end of the vacuum pump is communicated with the output end of the tank inner shell through a fourth pipeline, an acid absorption block is arranged in the vacuum pump, a water inlet pipe is arranged at the other side outside the tank body, a steam generator is arranged between the output end of the water inlet pipe and the input end of the shell of the tank body, the acid absorption block is used for absorbing sulfuric acid, water is converted into steam through the steam generator and enters the inner wall of the tank body to provide a heat source for reactant reaction in the tank body, and the acid absorption block is made of chemical adsorption cotton and can absorb acid mist formed by the sulfuric acid.

As a further aspect of the present invention: be provided with electric putter on the top inner wall of vacuum pump, electric putter's drive end is provided with the fly leaf, the top fixed connection of fly leaf and acid absorption piece, the external waste gas filter that still is provided with of jar, through two intercommunications of pipeline between vacuum pump and the waste gas filter, acid absorption piece absorbs the acid mist, and the acid mist and the steam that are not absorbed completely get into abandonment filter through two pipelines and handle, reduce air pollution.

As a further aspect of the present invention: the tank body is also provided with a second collector outside, the tank body shell is communicated with the second collector through a fifth pipeline, the waste gas filter is fixedly installed on the upper portion of the second collector, and water vapor for supplying heat for reaction on the inner wall of the tank body enters the second collector through the fifth pipeline to be cooled into liquid water to be collected.

As a further aspect of the present invention: and the second collector is communicated with the steam generator through a third pipeline, a compression pump is arranged on the third pipeline, and the compression pump is used for pumping water in the second collector into the steam generator through the third pipeline.

As a further aspect of the present invention: the first collector is arranged outside the tank body, the input end of the first collector is communicated with the output end of the vacuum pump through a first pipeline, the first collector is fixedly arranged on the outer wall of the tank body, after the reaction is finished, the electric push rod pushes the fixing plate to extrude the acid absorption block, sulfuric acid absorbed in the acid absorption block is extruded out, and the extruded sulfuric acid push rod pipeline flows into the first collector to be collected for later-period reuse.

As a further aspect of the present invention: the inlet pipe I all is provided with the feed inlet lid with the input end department of inlet pipe two, covers the feed inlet lid during the use, avoids impurity entering jar internal portion to influence production.

As a further aspect of the present invention: the tank body is made of tantalum, and the material is good in sulfuric acid corrosion resistance, excellent in heat transfer and long in service life of 20 years.

The utility model has the advantages that:

1. the utility model discloses a set up hot steam as the heat supply energy, use the thermal efficiency high, hot steam can make the reaction temperature at the internal different positions of jar constant when heating to jar internal heat supply, it is even to make the reaction be heated, and will react the back hot steam and collect and cool off, but at heating cyclic utilization after cooling into liquid water, reduction in production cost, 73% sulphuric acid dehydration generates 88% sulphuric acid in the reactant, collect concentrated sulphuric acid and can reuse once more, a small part of sulphuric acid gets into exhaust gas filter and handles, avoided directly discharging acid mist meeting polluted environment.

2. Under vacuum state, the boiling point of sulphuric acid descends, and operating temperature reduces, and the corrosivity to the material reduces, has increased corrosion-resistant material's selectivity, and borosilicate glass, steel lining tetrafluoro and enamel etc. all can suitably choose for use, the utility model discloses a good and heat transfer good tantalum material of sulphuric acid corrosion resistance is as heating element, and this component life can reach 20 years.

Drawings

The present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a prior art configuration;

fig. 2 is a front sectional view of the present invention;

fig. 3 is a top view of the present invention;

fig. 4 is an enlarged schematic view of the area a in fig. 2 according to the present invention.

In the figure: 1. a tank body; 2. a feeding pipe I; 3. a feeding pipe II; 4. a feed inlet cover; 5. a vacuum pump; 6. acid absorption blocks; 7. a first pipeline; 8. a first collector; 9. a second pipeline; 10. a second collector; 11. A movable plate; 12. an electric push rod; 13. a steam generator; 14. a water inlet pipe; 15. a third pipeline; 16. A compression pump; 17. a fourth pipeline; 18. a fifth pipeline; 19. an exhaust gas filter.

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 of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 2-3, a vacuum concentration device for nitrochlorobenzene production comprises a tank body 1, wherein a first feeding pipe 2 is arranged on the upper surface of the tank body 1, a vacuum pump 5 is arranged on one side outside the tank body 1, an outer shell of the tank body 1 is of a double-layer structure, a second feeding pipe 3 is further arranged on the upper surface of the tank body 1, the first feeding pipe 2 and the second feeding pipe 3 are communicated with an inner shell of the tank body 1, an input end of the vacuum pump 5 is communicated with an output end of the inner shell of the tank body 1 through a fourth pipeline 17, an acid absorption block 6 is arranged in the vacuum pump 5, a water inlet pipe 14 is arranged on the other side outside the tank body 1, and a steam generator 13 is arranged between an output end of the water inlet pipe 14 and an input end of the outer shell of the tank body 1.

The working process is as follows: chlorobenzene is added into the tank body 1 from the first feeding pipe 2, sulfuric acid and nitric acid are added into the tank body 1 through the second feeding pipe 3, water begins to be introduced into the water inlet pipe 14, the water is converted into steam through the steam generator 13, a heat source is provided for reaction when the water enters the double-layer shell of the tank body 1, after the reaction is completed, part of the sulfuric acid is converted into acid mist, the water in the sulfuric acid is converted into the steam through heating, the steam and the acid mist enter the vacuum pump 5 through the fourth pipeline 17, and the acid mist is absorbed by the acid absorption block 6.

Referring to fig. 2 and 4, the acid absorption block 6 absorbs the acid mist, the acid mist is stored inside the acid absorption block 6, in order to collect the acid mist for reuse and collect the acid mist which cannot be completely absorbed by the acid absorption block 6 and the steam, an electric push rod 12 is arranged on the inner wall of the top of the vacuum pump 5, a movable plate 11 is arranged at the driving end of the electric push rod 12, the movable plate 11 is fixedly connected with the top end of the acid absorption block 6, the tank body 1 is also provided with an exhaust gas filter 19, the vacuum pump 5 is communicated with the waste gas filter 19 through a second pipeline 9, the significance of the scheme is that the acid absorption block 6 absorbs most of acid mist, the sulfuric acid is extruded by the electric push rod 12 and the movable plate 11, and a small part of acid mist and steam enter the waste gas filter 19 through the second pipeline 9 for treatment, so that the direct emission of most of the acid mist is avoided, and the environment pollution is avoided.

Referring to fig. 2, a second collector 10 is further arranged outside the tank body 1, the shell of the tank body 1 is communicated with the second collector 10 through a fifth pipeline 18, and the exhaust gas filter 19 is fixedly mounted on the upper portion of the second collector 10.

Referring to fig. 2, in order to recycle the water in the second collector 10, the second collector 10 is communicated with the steam generator 13 through a third pipe 15, and a compression pump 16 is arranged on the third pipe 15.

Referring to fig. 2 and 4, the electric push rod 12 and the movable plate 11 extrude the acid absorption block 6, sulfuric acid absorbed in the acid absorption block 6 is extruded out, in order to collect sulfuric acid, a collector I8 is arranged outside the tank body 1, an input end of the collector I8 is communicated with an output end of the vacuum pump 5 through a pipeline I7, and the collector I8 is fixedly arranged on the outer wall of the tank body 1.

Referring to fig. 2, a feeding port cover 4 is disposed at the input end of each of the feeding pipes 2 and 3 to ensure the vacuum condition of the reaction and prevent impurities from entering the tank 1.

Referring to fig. 2, the tank 1 is made of tantalum, which has good corrosion resistance, excellent heat transfer and long service life.

The utility model discloses a theory of operation:

introducing reaction products into the tank body 1 from the first feeding pipe 2 and the second feeding pipe 3, covering the feeding port covers 4 of the first feeding pipe 2 and the second feeding pipe 3 after the reaction products are added, starting water inlet of the water inlet pipe 14, converting cold water into hot steam by the steam generator 13, introducing the hot steam between the double-layer inner walls of the tank body 1, provides a heat source for reactants in the tank body 1, the tank body 1 is made of tantalum material, has excellent heat transfer performance, 73 percent of sulfuric acid forms acid mist in the reaction process, the water in the acid mist and the water vapor are evaporated to form water vapor, the acid mist and the water vapor enter the vacuum pump 5 through the fourth pipeline 17, most of the acid mist is absorbed by the acid absorption block 6 and flows into the first collector 8 to be collected through the extrusion of the movable plate 11, a small part of the unabsorbed acid mist and the water vapor enter the waste gas filter 19 through the second pipeline 9 to be treated, and the reacted heat source water vapor flows into the second collector 10 through the fifth pipeline 18 to be cooled into liquid water to be collected so as to be recycled at a later stage.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims (7)

1. A vacuum concentration device for nitrochlorobenzene production comprises a tank body (1), wherein a first feeding pipe (2) is arranged on the upper surface of the tank body (1), a vacuum pump (5) is arranged on one outer side of the tank body (1), it is characterized in that the shell of the tank body (1) is of a double-layer structure, the upper surface of the tank body (1) is also provided with a feeding pipe II (3), the output ends of the first feeding pipe (2) and the second feeding pipe (3) are communicated with the inner shell of the tank body (1), the input end of the vacuum pump (5) is communicated with the output end of the inner shell of the tank body (1) through a pipeline IV (17), an acid absorption block (6) is arranged in the vacuum pump (5), a water inlet pipe (14) is arranged at the other side outside the tank body (1), and a steam generator (13) is arranged between the output end of the water inlet pipe (14) and the input end of the shell of the tank body (1).

2. The vacuum concentration equipment for nitrochlorobenzene production according to claim 1, wherein an electric push rod (12) is arranged on the inner wall of the top of the vacuum pump (5), a movable plate (11) is arranged at the driving end of the electric push rod (12), the movable plate (11) is fixedly connected with the top end of the acid absorption block (6) and an exhaust gas filter (19) is further arranged outside the tank body (1), and the vacuum pump (5) is communicated with the exhaust gas filter (19) through a second pipeline (9).

3. The vacuum concentration equipment for nitrochlorobenzene production according to claim 2, wherein a second collector (10) is further arranged outside the tank body (1), the shell of the tank body (1) is communicated with the second collector (10) through a fifth pipeline (18), and the exhaust gas filter (19) is fixedly mounted on the upper portion of the second collector (10).

4. The vacuum concentration equipment for nitrochlorobenzene production according to claim 3, wherein the collector II (10) is communicated with the steam generator (13) through a pipe III (15), and the pipe III (15) is provided with a compression pump (16).

5. The vacuum concentration equipment for nitrochlorobenzene production according to claim 1, wherein a first collector (8) is arranged outside the tank body (1), an input end of the first collector (8) is communicated with an output end of the vacuum pump (5) through a first pipeline (7), and the first collector (8) is fixedly arranged on the outer wall of the tank body (1).

6. The vacuum concentration equipment for nitrochlorobenzene production according to claim 1, wherein the inlet ports of the inlet pipe I (2) and the inlet pipe II (3) are provided with inlet port covers (4).

7. The vacuum concentration equipment for nitrochlorobenzene production according to claim 1, wherein the tank body (1) is made of tantalum.

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