CN218516408U

CN218516408U - Concentrated nitric acid recovery unit

Info

Publication number: CN218516408U
Application number: CN202122755145.0U
Authority: CN
Inventors: 巩守龙; 刘付亮; 白兴芹; 周阿宝; 李轩
Original assignee: Yankuang Group Yulin Fine Chemical Co ltd
Current assignee: Yankuang Group Yulin Fine Chemical Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2023-02-24
Anticipated expiration: 2031-11-11

Abstract

The utility model relates to a concentrated nitric acid recovery unit, include: the underground storage tank is arranged underground in the workshop and used for collecting liquid discharged after the front-stage process treatment through the collecting pipe; the top of the underground storage tank is provided with a transfer pump; and the liquid pumped out by the transfer pump is conveyed to the concentrated nitric acid storage tank through the liquid outlet pipe for recycling. The utility model discloses a concentrated nitric acid recovery unit through setting up underground storage tank in workshop secret low point, according to the several kinds of technological process conditions that probably meet in workshop, directly with in the collecting pipe connection underground storage tank. On-site operating personnel can in time carry the concentrated nitric acid storage tank with the liquid in the underground storage tank to the retrieval and utilization according to the operating mode, and the technique exhaust liquid that produces in this workshop is through collecting pipe recovery and recycle, has reduced manufacturing cost and environmental protection cost, has reduced the pollution and the injury of operator to the environment simultaneously.

Description

Concentrated nitric acid recovery unit

Technical Field

The utility model relates to a toxic gas's collection device technical field, more specifically the saying so relates to a concentrated nitric acid recovery unit.

Background

Concentrated nitric acid is a hazardous industrial chemical and is extremely corrosive and oxidizing. Concentrated nitric acid exposed to the air can give off a large amount of nitrogen oxide gas (NOx), which is a toxic gas. Therefore, in the production workshop involving the concentrated nitric acid process, the field operators can be damaged by occupational health such as chemical burns, poisoning and the like.

At present, most factories use plastic containers for liquid receiving, manual transfer, temporary pipeline recovery and other processes when discharging concentrated nitric acid. The potential safety hazard is many, and mill operational environment is abominable, easily causes the safety in production accident. The discharged concentrated nitric acid is difficult to recycle and needs to be discharged after harmless treatment, so that the environmental protection cost is higher.

Therefore, in order to eliminate potential safety hazards, improve working environment, reduce labor intensity of workers and environmental protection expenses, how to provide a concentrated nitric acid recovery device is a problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model aims to provide a concentrated nitric acid recovery unit solves the problem that harmful gas and liquid in the workshop are difficult to recycle and cause pollution to the environment at present.

The utility model provides a concentrated nitric acid recovery unit, include:

the underground storage tank is arranged underground in the workshop and used for collecting liquid discharged after the front-stage process treatment through a collecting pipe;

the top of the underground storage tank is provided with the transfer pump; and

and the liquid pumped out by the transfer pump is conveyed to the concentrated nitric acid storage tank through a liquid outlet pipe for recycling.

Can know via foretell technical scheme, compare with prior art, the utility model discloses a concentrated nitric acid recovery unit through set up underground storage tank in workshop underground low point, according to the several process handling circumstances (like equipment process treatment, pipeline process treatment etc.) that probably meet in the workshop, directly with collecting pipe connection in the underground storage tank. On-the-spot operating personnel can in time carry the concentrated nitric acid storage tank with the liquid in the underground storage tank to the retrieval and utilization according to the operating mode, and the process exhaust liquid that produces in this workshop is retrieved through the collecting pipe and is recycled, has reduced manufacturing cost and environmental protection cost, has reduced the pollution and the injury of operator to the environment simultaneously.

Further, a storage tank remote transmission liquid level meter for monitoring the liquid level is arranged at the top of the underground storage tank.

Further, a storage tank breather valve used for keeping the internal air pressure balance is arranged at the top of the underground storage tank.

Further, the top of the underground storage tank is provided with a tail gas discharge pipe, and the tail gas discharge pipe is connected to a nitrogen oxide gas absorption device through a tail gas compressor.

Furthermore, a nitrogen oxide gas alarm instrument for monitoring toxic gas accumulation caused by leakage is arranged in an underground pond of a workshop where the underground storage tank is located.

Further, the underground pond of the workshop is provided with a compressed air purging system which can fully replace the toxic and harmful gases in the underground pond before the beginning of the overhaul.

Further, compressed air purge system includes compressed air spray tube and pneumatic trip valve, the compressed air spray tube is for having porous steel pipe, and its one end level arranges workshop underground pool bottom, and the other end extends the workshop underground pool is outer to be connected with outside air supply, is provided with on its other end the pneumatic trip valve.

Furthermore, a pneumatic regulating valve is arranged on the liquid outlet pipe, and a return pipeline connected with the underground storage tank is arranged at one end, far away from the concentrated nitric acid storage tank, of the pneumatic regulating valve.

Further, concentrated nitric acid storage tank top is provided with retrieval and utilization jar teletransmission level gauge, retrieval and utilization jar breather valve and exhaust pipe, exhaust pipe connects the tail gas delivery pipe.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a concentrated nitric acid recovery device provided by the utility model.

In the figure: 1-underground storage tank, 11-collecting pipe, 13-tail gas discharging pipe, 14-tail gas compressor, 15-workshop underground pool, 2-transfer pump, 21-liquid outlet pipe, 22-pneumatic regulating valve, 23-return pipeline, 3-concentrated nitric acid storage tank, 31-recycling tank remote liquid level meter, 32-recycling tank breather valve, 33-exhaust pipeline, 4-storage tank remote liquid level meter, 5-storage tank breather valve, 6-nitrogen oxide gas alarm, 71-compressed air spraying pipe and 72-pneumatic cut-off valve.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the prior art, a plastic container is generally used for liquid receiving, manual transfer, temporary pipeline recovery and other processes when concentrated nitric acid is discharged. The potential safety hazard is many, and mill operational environment is abominable, easily causes the safety in production accident. The discharged concentrated nitric acid is difficult to recycle and needs to be discharged after harmless treatment, so that the environmental protection cost is higher.

Therefore, the embodiment of the utility model discloses a concentrated nitric acid recovery unit, refer to fig. 1, include: the underground storage tank 1 is arranged underground in a workshop, and liquid discharged after the front-stage process treatment is collected through a collecting pipe 11; the transfer pump 2 is arranged at the top of the underground storage tank 1; and the concentrated nitric acid storage tank 3 is used for conveying the liquid pumped out by the transfer pump 2 to the concentrated nitric acid storage tank 3 through a liquid outlet pipe 21 for recycling.

In an embodiment of the utility model, underground storage tank 1 top is provided with the storage tank teletransmission level gauge 4 that is used for monitoring the liquid level, prevents that the container from evaporating or the transfer pump is managed to find time.

Advantageously, the top of the underground storage tank 1 is provided with a storage tank breather valve 5 for keeping the internal air pressure balance; the underground storage tank is protected from the influence of the atmospheric pressure on the equipment body in the concentrated nitric acid conveying process.

More advantageously, the underground storage tank 1 is provided with a tail gas discharge pipe 13 at the top, and the tail gas discharge pipe 13 is connected to a nitrogen oxide gas absorption device through a tail gas compressor 14, so as to ensure that the inside of the equipment is kept in a micro-negative pressure state and prevent the nitrogen oxide gas from volatilizing.

In another embodiment of the present invention, the underground storage tank 1 is equipped with a nitrogen oxide gas alarm 6 for monitoring the accumulation of toxic gas caused by leakage in the underground pool 15 of the workshop.

In other embodiments of the present invention, the underground pit 15 of the workshop is equipped with a compressed air purging system that allows for the sufficient replacement of toxic and harmful gases in the underground pit before the start of the overhaul.

Specifically, the compressed air purging system comprises a compressed air spray pipe 71 and a pneumatic cut-off valve 72, wherein the compressed air spray pipe 71 is a steel pipe with multiple holes, one end of the steel pipe is horizontally arranged at the bottom of the workshop underground pool 15, the other end of the steel pipe extends out of the workshop underground pool 15 and is connected with an external air source, and the other end of the steel pipe is provided with the pneumatic cut-off valve 72.

In the above embodiment, a pneumatic control valve 22 is arranged on the liquid outlet pipe 21, one end of the pneumatic control valve 22, which is far away from the concentrated nitric acid storage tank 3, is provided with a return line 23 connected to the underground storage tank 1, and when the pneumatic control valve is closed, the liquid returns to the underground storage tank 1 through the return line.

In the above embodiment, the top of the concentrated nitric acid storage tank 3 is provided with a remote liquid level meter 31 for a recycling tank, a breather valve 32 for the recycling tank and an exhaust pipeline 33, and the exhaust pipeline 33 is connected with the tail gas discharge pipe 13.

The utility model eliminates the risk caused by the outflow of nitric acid in the industrial production process; meanwhile, the discharged nitric acid can be recycled, so that the production cost and the environmental protection cost are reduced.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A concentrated nitric acid recovery device is characterized by comprising:

the underground storage tank (1) is arranged underground in a workshop, and liquid discharged after the front-stage process treatment is collected through a collecting pipe (11);

the transfer pump (2) is arranged at the top of the underground storage tank (1); and

and the liquid pumped out by the transfer pump (2) is conveyed to the concentrated nitric acid storage tank (3) through a liquid outlet pipe (21) for recycling.

2. A concentrated nitric acid recovery unit according to claim 1, characterized in that the top of the underground storage tank (1) is provided with a storage tank remote level meter (4) for monitoring the liquid level.

3. A concentrated nitric acid recovery unit according to claim 1, characterized in that the top of the underground storage tank (1) is provided with a storage tank breather valve (5) for keeping the internal pressure balanced.

4. A concentrated nitric acid recovery unit according to claim 3, characterized in that the top of the underground storage tank (1) is provided with a tail gas discharge pipe (13), and the tail gas discharge pipe (13) is connected to a nitrogen oxide gas absorption unit via a tail gas compressor (14).

5. A concentrated nitric acid recovery unit according to any of claims 1-4, characterized in that the underground storage tank (1) is equipped with nitrogen oxide gas alarm (6) in the underground pool (15) of the workshop for monitoring the accumulation of toxic gases due to leakage.

6. A concentrated nitric acid recovery unit according to claim 5, characterized in that the underground pit (15) of the workshop is equipped with a compressed air purge system to allow adequate replacement of the underground pit toxic and harmful gases before the start of the overhaul.

7. The concentrated nitric acid recovery device according to claim 6, wherein the compressed air purging system comprises a compressed air nozzle (71) and a pneumatic cut-off valve (72), the compressed air nozzle (71) is a steel pipe with multiple holes, one end of the steel pipe is horizontally arranged at the bottom of the workshop underground pool (15), the other end of the steel pipe extends out of the workshop underground pool (15) and is connected with an external air source, and the pneumatic cut-off valve (72) is arranged at the other end of the steel pipe.

8. A concentrated nitric acid recovery device according to any of claims 1-4, characterized in that a pneumatic control valve (22) is arranged on the liquid outlet pipe (21), and a return pipeline (23) connected with the underground storage tank (1) is arranged at one end of the pneumatic control valve (22) far away from the concentrated nitric acid storage tank (3).

9. A concentrated nitric acid recovery device according to claim 4, wherein a recycle tank remote liquid level meter (31), a recycle tank breather valve (32) and an exhaust pipeline (33) are arranged at the top of the concentrated nitric acid storage tank (3), and the exhaust pipeline (33) is connected with the tail gas discharge pipe (13).