Unsymmetrical dimethylhydrazine continuous rectification device

Abstract

The utility model discloses a continuous rectification device for unsymmetrical dimethylhydrazine, which belongs to the technical field of extraction and comprises a rectification tower main body, a condensation tank and a condensation pipeline, the condensation pipeline is mounted in the condensation tank and connected with the rectification tower main body, and a secondary condensation structure is connected onto the condensation pipeline. The secondary condensation structure is composed of a draught fan, a Z-shaped steam pipe, a conveying pipe, a second spiral pipe and a second liquid outlet pipe, the Z-shaped steam pipe is fixedly installed at the position of an air inlet pipe of the draught fan, and the conveying pipe is fixedly installed at the position of an air outlet pipe of the draught fan. According to the steam condensation device, secondary condensation can be carried out on steam which enters the first liquid outlet pipeline and is not fully condensed, so that the steam can be fully condensed, the steam can be prevented from being discharged from the condensation pipeline along with condensed liquid, and finally resource waste can be reduced; and meanwhile, the harm of gaseous dimethylhydrazine to the body health of surrounding workers can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of extraction, in particular to a continuous dimethylhydrazine rectification device. Background Art

[0002] Unsymmetrical dimethylhydrazine can be synthesized by reaction with ammonia water, ammonium chloride and dimethylamine as raw materials. First, ammonia water and sodium hypochlorite are respectively sent to a one-step reactor to react to generate chloroamine, and then the chloroamine is sent to a two-step reactor to synthesize with a dimethylamine aqueous solution to generate an unsymmetrical dimethylhydrazine aqueous solution, and then the synthetic liquid is sent to a series of distillation towers for further distillation and rectification to remove excess ammonia, dimethylamine and partial hydrazone, and after adding alkali to concentrate and degas, the finished product is obtained. The distillation equipment used for the rectification of unsymmetrical dimethylhydrazine aqueous solution is a device used to separate and purify the unsymmetrical dimethylhydrazine aqueous solution. The equipment is usually composed of multiple towers, and the unsymmetrical dimethylhydrazine aqueous solution is repeatedly vaporized and condensed in the tower by heating and condensing, thereby achieving distillation separation. When using traditional distillation equipment, insufficient steam condensation may occur, that is, some of the steam that is not fully condensed will be discharged from the condenser along with the condensed liquid, which will cause a certain waste of resources. At the same time, since the steam generated by heating the unsymmetrical dimethylhydrazine aqueous solution has a certain toxicity, the steam is easily inhaled into the body by the surrounding staff after being discharged, and finally endangers the health of the surrounding staff. Therefore, a unsymmetrical dimethylhydrazine continuous distillation device is needed to solve the above problems. Utility Model Content

[0003] The main purpose of the utility model is to provide a continuous dimethylhydrazine distillation device, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A continuous dimethylhydrazine distillation device comprises a distillation tower body, a condensation tank and a condensation pipeline, wherein the condensation pipeline is installed in the condensation tank and connected to the distillation tower body, and a secondary condensation structure is connected to the condensation pipeline, and the secondary condensation structure consists of a fan, a Z-shaped steam pipe, a delivery pipe, a No. 2 spiral pipe and a No. 2 liquid outlet pipe, wherein the Z-shaped steam pipe is fixedly installed at the air inlet pipe of the fan, the delivery pipe is fixedly installed at the air outlet pipe of the fan, the head end of the No. 2 spiral pipe is fixedly connected to one end of the delivery pipe, and the No. 2 liquid outlet pipe is fixedly installed at the tail end of the No. 2 spiral pipe.

[0006] Preferably, the distillation tower body and the condensing tank are both fixedly mounted on the upper end of the mounting base via a bracket.

[0007] Preferably, a cooling water pool and a circulating water pump are fixedly mounted on the upper end of the mounting base, the circulating water pump is connected to the cooling water pool and the condensing tank respectively through pipelines, and the condensing tank is connected to the cooling water pool through a pipeline.

[0008] Preferably, the condensing pipe is composed of a No. 1 spiral pipe, a steam pipe and a No. 1 liquid outlet pipe, the steam pipe is fixedly installed at the head end of the No. 1 spiral pipe, the No. 1 liquid outlet pipe is fixedly installed at the tail end of the No. 1 spiral pipe, the No. 1 spiral pipe is located in the condensing tank, the steam pipe is connected to the distillation tower body, and a valve is installed at one end of the No. 1 liquid outlet pipe and on the outside of the condensing tank.

[0009] Preferably, the No. 2 spiral tube and the No. 2 liquid outlet pipe on the secondary condensation structure are both located in the condensation tank, the fan is located outside the condensation tank, and the fan is fixedly mounted on the upper end of the mounting base through a bracket.

[0010] Preferably, the Z-shaped steam pipe on the secondary condensation structure is fixedly connected to the No. 1 liquid outlet pipe, and the No. 2 liquid outlet pipe is fixedly connected to the tail of the No. 1 spiral pipe.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] By providing a secondary condensation structure connected to the condensation pipe, the steam that enters the No. 1 liquid outlet pipe and is not fully condensed can be secondary condensed, so that the steam can be fully condensed, and the steam can be prevented from being discharged from the condensation pipe along with the condensed liquid, which can ultimately reduce the waste of resources and prevent the steam generated by the heating of the unsymmetrical dimethylhydrazine aqueous solution from causing harm to the health of surrounding workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the distillation tower body, condensation tank, condensation pipeline, secondary condensation structure, installation base, cooling water pool and circulating water pump of the utility model;

[0014] Figure 2 It is a structural schematic diagram of the distillation tower body, condensation tank, condensation pipeline, secondary condensation structure, installation base and cooling water pool of the utility model;

[0015] Figure 3 It is a structural schematic diagram of the condensation pipeline and the secondary condensation structure of the utility model;

[0016] Figure 4 It is a structural schematic diagram of the secondary condensation structure of the utility model.

[0017] In the figure: 1. Distillation tower body; 2. Condensation tank; 3. Condensation pipeline; 4. Secondary condensation structure; 5. Installation base; 6. Cooling water pool; 7. Circulating water pump; 8. No. 1 spiral pipe; 9. Steam pipeline; 10. No. 1 liquid outlet pipe; 11. Valve; 12. Fan; 13. Z-shaped steam pipe; 14. Delivery pipe; 15. No. 2 spiral pipe; 16. No. 2 liquid outlet pipe. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a continuous dimethylhydrazine distillation device includes a distillation tower body 1, a condensation tank 2 and a condensation pipe 3, the condensation pipe 3 is installed in the condensation tank 2, and the condensation pipe 3 is connected to the distillation tower body 1, the distillation tower body 1 and the condensation tank 2 are fixedly installed on the upper end of the installation base 5 through a bracket, and a cooling water pool 6 and a circulating water pump 7 are fixedly installed on the upper end of the installation base 5. The circulating water pump 7 is connected to the cooling water pool 6 and the condensation tank 2 through pipelines, and the condensation tank 2 is connected to the cooling water pool 6 through a pipeline. The condensation pipe 3 consists of a No. 1 spiral pipe 8, a steam pipe 9 and a No. 1 liquid outlet pipe 10. The steam pipe 9 is fixedly installed at the head end of the No. 1 spiral pipe 8, and the No. 1 liquid outlet pipe 10 is fixedly installed at the tail end of the No. 1 spiral pipe 8. The No. 1 spiral pipe 8 is located in the condensation tank 2, and the steam pipe 9 is connected to the distillation tower body 1. A valve 11 is installed at one end of the No. 1 liquid outlet pipe 10 and on the outside of the condensation tank 2.

[0020] See also Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the condensation pipeline 3 is connected with a secondary condensation structure 4, which is composed of a fan 12, a Z-shaped steam pipe 13, a delivery pipe 14, a No. 2 spiral pipe 15 and a No. 2 liquid outlet pipe 16. The Z-shaped steam pipe 13 is fixedly installed at the air inlet pipe of the fan 12, the delivery pipe 14 is fixedly installed at the air outlet pipe of the fan 12, the head end of the No. 2 spiral pipe 15 is fixedly connected to one end of the delivery pipe 14, and the No. 2 liquid outlet pipe 16 is fixedly installed at the tail end of the No. 2 spiral pipe 15. The No. 2 spiral pipe 15 and the No. 2 liquid outlet pipe 16 on the secondary condensation structure 4 are both located in the condensation tank 2, the fan 12 is located outside the condensation tank 2, and the fan 12 is located outside the condensation tank 2. 12 is fixedly mounted on the upper end of the mounting base 5 through a bracket, the Z-shaped steam pipe 13 on the secondary condensation structure 4 is fixedly connected to the No. 1 liquid outlet pipe 10, and the No. 2 liquid outlet pipe 16 is fixedly connected to the tail of the No. 1 spiral tube 8. By setting up a secondary condensation structure 4 connected to the condensation pipe 3, the steam that enters the No. 1 liquid outlet pipe 10 and is not fully condensed can be secondary condensed, so that the steam can be fully condensed, and then the steam can be prevented from being discharged from the condensation pipe 3 along with the condensed liquid, which can ultimately reduce the waste of resources and at the same time prevent the gaseous dimethylhydrazine from causing harm to the health of surrounding workers.

[0021] It should be noted that the utility model is a continuous dimethylhydrazine distillation device. When in use, the dimethylhydrazine aqueous solution to be distilled is first placed in the distillation tower body 1, and then the dimethylhydrazine aqueous solution in the distillation tower body 1 is heated. Then, the steam generated by the heating of the dimethylhydrazine aqueous solution will enter the condensation pipe 3. At this time, the steam will enter the first spiral pipe 8 along the steam pipe 9. At the same time, the circulating water pump 7 will pump the cooling water in the cooling water pool 6 into the condensation tank 2, so that the cooling water is used to distill the steam in the first spiral pipe 8. The steam is cooled, thereby condensing the steam in the No. 1 spiral tube 8 into liquid, and finally the liquid flows out from the No. 1 liquid outlet pipe 10; in this process, the fan 12 on the secondary condensation structure 4 can be started, so that the steam that has entered the No. 1 liquid outlet pipe 10 and has not been fully condensed can be pumped into the No. 2 spiral tube 15 through the Z-shaped steam pipe 13 and the conveying pipe 14 for secondary condensation. After the steam condenses into liquid in the No. 2 spiral tube 15, it will re-enter the No. 1 spiral tube 8 through the No. 2 liquid outlet pipe 16, and finally it will also flow out from the No. 1 liquid outlet pipe 10.

[0022] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model. The protection scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A continuous dimethylhydrazine distillation device, comprising a distillation tower body (1), a condensation tank (2) and a condensation pipeline (3), wherein the condensation pipeline (3) is installed in the condensation tank (2) and connected to the distillation tower body (1), characterized in that: The condensation pipe (3) is connected to a secondary condensation structure (4), and the secondary condensation structure (4) is composed of a fan (12), a Z-shaped steam pipe (13), a delivery pipe (14), a No. 2 spiral pipe (15) and a No. 2 liquid outlet pipe (16). The Z-shaped steam pipe (13) is fixedly installed at the air inlet pipe of the fan (12), the delivery pipe (14) is fixedly installed at the air outlet pipe of the fan (12), the head end of the No. 2 spiral pipe (15) is fixedly connected to one end of the delivery pipe (14), and the No. 2 liquid outlet pipe (16) is fixedly installed at the tail end of the No. 2 spiral pipe (15).

2. A continuous dimethylhydrazine distillation device according to claim 1, characterized in that: The distillation tower body (1) and the condensation tank (2) are both fixedly mounted on the upper end of the mounting base (5) via a bracket.

3. A continuous dimethylhydrazine distillation device according to claim 2, characterized in that: A cooling water pool (6) and a circulating water pump (7) are fixedly mounted on the upper end of the mounting base (5); the circulating water pump (7) is connected to the cooling water pool (6) and the condensation tank (2) through pipelines, respectively; and the condensation tank (2) is connected to the cooling water pool (6) through pipelines.

4. A continuous dimethylhydrazine distillation device according to claim 3, characterized in that: The condensing pipe (3) is composed of a No. 1 spiral pipe (8), a steam pipe (9) and a No. 1 liquid outlet pipe (10), wherein the steam pipe (9) is fixedly installed at the head end of the No. 1 spiral pipe (8), and the No. 1 liquid outlet pipe (10) is fixedly installed at the tail end of the No. 1 spiral pipe (8), the No. 1 spiral pipe (8) is located in the condensing tank (2), the steam pipe (9) is connected to the distillation tower body (1), and a valve (11) is installed at one end of the No. 1 liquid outlet pipe (10) and on the outside of the condensing tank (2).

5. The continuous distillation device of unsymmetrical dimethylhydrazine according to claim 4, characterized in that: The No. 2 spiral tube (15) and the No. 2 liquid outlet pipe (16) on the secondary condensation structure (4) are both located in the condensation tank (2), the fan (12) is located outside the condensation tank (2), and the fan (12) is fixedly mounted on the upper end of the mounting base (5) via a bracket.

6. The unsymmetrical dimethylhydrazine continuous distillation device according to claim 5, characterized in that: The Z-shaped steam pipe (13) on the secondary condensation structure (4) is fixedly connected to the No. 1 liquid outlet pipe (10), and the No. 2 liquid outlet pipe (16) is fixedly connected to the tail of the No. 1 spiral pipe (8).

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