Pipeline structure of ethanolamine preparation device

Abstract

The utility model discloses a pipeline structure of an ethanolamine preparation device, which comprises a main pipeline, a refining tower, a tower top cooler and a reflux tank are sequentially arranged on the main pipeline, a reflux pump is arranged on a part of the main pipeline connected with a material outlet pipeline of the reflux tank, and the tail end of the main pipeline is connected with a material reflux inlet of the reflux tank; the first branch pipeline is connected with the circulating pipeline through a circulating pump; the second branch pipeline is connected with the intermediate tank; the third branch pipeline is connected with a material reflux inlet of the refining tower; the first branch pipeline, the second branch pipeline and the third branch pipeline are connected to the main pipeline in parallel. Based on the pipeline structure provided by the utility model, on the premise that the installation height of machine equipment is not changed, the pressure requirement of the inlet of the machine pump is met, and the model selection of the machine pump is convenient.

Description

Technical Field

[0001] The utility model relates to an ethanolamine preparation device, in particular to a pipeline structure of an ethanolamine preparation device. Background Art

[0002] At present, ethanolamine devices generally include a refining tower. The product prepared in the refining tower is cooled and then output through a reflux tank. A part of it enters the circulation pipeline under the action of the circulation pump, and the other part flows back to the reflux tank. Due to the idle installation conditions at the industrial site, the installation height of the reflux tank is limited. In order to make the device work properly, the cavitation margin of the pump for the material transported to the reflux tank is required to be high, resulting in the frequent occurrence of negative inlet pressure of the circulation pump. Therefore, the performance requirements for the circulation pump are high, and conventional pumps cannot meet the material circulation requirements of the device.

[0003] In order to solve the above problems, the traditional method usually adopts adjusting the equipment height and re-adjusting the equipment layout to meet the inlet pressure requirement of the circulation pump. However, frequent adjustment of the equipment layout is not only time-consuming and labor-intensive, but also affects the overall stability of the preparation device and creates safety hazards. Summary of the invention

[0004] In view of the shortcomings of the prior art, the utility model provides a pipeline structure of an ethanolamine preparation device. Based on the pipeline structure provided by the utility model, the pump inlet pressure requirement can be met without changing the installation height of the equipment, making the pump selection convenient.

[0005] The technical means adopted by the present invention are as follows:

[0006] A pipeline structure of an ethanolamine preparation device, comprising:

[0007] A main pipeline, wherein a refining tower, a tower top cooler and a reflux tank are sequentially arranged on the main pipeline, a material outlet of the refining tower is connected to a material inlet of the tower top cooler through a part of the main pipeline, a material outlet of the tower top cooler is connected to a material inlet of the reflux tank through a part of the main pipeline, a reflux pump is arranged on a part of the main pipeline connected to a material outlet pipeline of the reflux tank, and an end of the main pipeline is connected to a material reflux port of the reflux tank;

[0008] A first branch pipeline, wherein the first branch pipeline is connected to the circulation pipeline through a circulation pump;

[0009] a second branch pipeline, wherein the second branch pipeline is connected to the intermediate tank;

[0010] A third branch pipeline, wherein the third branch pipeline is connected to a material reflux port of a refining tower;

[0011] The first branch pipeline, the second branch pipeline and the third branch pipeline are connected in parallel to the main pipeline.

[0012] Furthermore, the first branch pipeline is also used to connect to a reflux pipeline, and a material outlet of the reflux pipeline is connected to the main pipeline.

[0013] Furthermore, a circulation flow regulating valve is provided on the first branch pipeline.

[0014] Furthermore, a product flow delivery outlet valve is provided on the second branch pipeline.

[0015] Furthermore, a product flow regulating bypass valve is also provided on the second branch pipeline, and the product flow regulating bypass valve is provided in parallel with the product flow delivery outlet valve.

[0016] Furthermore, the reflux tank is connected to a second branch pipeline through an adjusting pipeline, and a reflux tank level controller, a product delivery flow transmitter and a product delivery flow controller are sequentially arranged on the adjusting pipeline.

[0017] Furthermore, a reflux flow controller is provided on the third branch pipeline.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The utility model discloses a pipeline structure of an ethanolamine preparation device. On the basis of the original equipment pipeline structure design, a branch pipeline connected with a product intermediate tank is added to flexibly adjust the material flow and pressure in the main pipeline, thereby meeting the inlet pressure requirement of a circulating pump, solving the problem that the inlet of the circulating pump is difficult to adjust due to installation height restrictions, and the process requirements can be met without rearranging the equipment, thereby shortening the device construction period and saving construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 The utility model is a schematic diagram of the pipeline structure of an ethanolamine preparation device.

[0022] In the figure: 1. refining tower; 2. tower top cooler; 3. product reflux tank; 4. product reflux tank liquid level controller; 5. tower reflux pump outlet flow controller; 6. tower reflux pump; 7. tower reflux pump outlet flow regulating valve; 8. tower reflux pump outlet pressure regulating valve; 9. tower reflux pump outlet pressure controller; 10. circulation flow regulating valve; 11. tower reflux flow controller; 12. tower reflux flow regulating valve; 13. first product flow delivery outlet valve; 14. product flow regulating bypass valve; 15. product delivery flow transmitter; 16. product delivery flow controller; 17. product circulation pipeline; 18. product intermediate tank; 19. refining tower material inlet. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] like Figure 1 As shown, the utility model provides a pipeline structure of an ethanolamine preparation device, which mainly includes a main pipeline, a first branch pipeline, a second branch pipeline and a third branch pipeline, and the first branch pipeline, the second branch pipeline and the third branch pipeline are arranged in parallel with the main pipeline.

[0026] A refining tower 1, a tower top cooler 2 and a product reflux tank 3 are sequentially arranged on the main pipe. Specifically, the material outlet of the refining tower 1 is connected to the material inlet of the tower top cooler 2 through a part of the main pipe, the material outlet of the tower top cooler 2 is connected to the material inlet of the product reflux tank 3 through a part of the main pipe, a tower reflux pump 6 is arranged on the part of the main pipe connected to the material outlet pipeline of the product reflux tank 3, and the end of the main pipe is connected to the material reflux port of the product reflux tank 3.

[0027] As a preferred embodiment of the utility model, one end of the first branch pipeline is connected to the main pipeline, and the other end is connected to the circulation pipeline 17 through a circulation pump, and a circulation flow regulating valve 10 is provided on the first branch pipeline. Further, the first branch pipeline portion after the circulation flow regulating valve 10 is connected to a reflux pipeline, the material outlet of the reflux pipeline is connected to the main pipeline, and a tower reflux pump outlet pressure regulating valve 8 and a tower reflux pump outlet pressure controller 9 are provided on the reflux pipeline.

[0028] As a preferred embodiment of the utility model, the second branch pipeline is connected to the product intermediate tank 18, and a product flow regulating valve is arranged on the second branch pipeline, and a first product flow delivery outlet valve 13 and a second product flow delivery outlet valve are arranged before and after the product flow regulating valve, respectively, wherein a product flow regulating bypass valve 14 is connected in parallel at both ends of the first product flow delivery outlet valve and the second product flow delivery outlet valve. The purpose of arranging outlet valves before and after the product flow regulating valve is to close the outlet valves before and after the regulating valve and open the bypass valve to cut it out of the system when the regulating valve fails. Furthermore, the part of the second branch pipeline in front of the first product flow delivery outlet valve 13 is also connected to a regulating pipeline, and the other end of the regulating pipeline is connected to the product reflux tank 3, and a reflux tank level controller, a product delivery flow transmitter 15 and a product delivery flow controller 16 are arranged on the regulating pipeline.

[0029] As a preferred embodiment of the utility model, the third branch pipeline is connected to the material reflux port of the refining tower, and a tower reflux flow regulating valve is provided on the third branch loop, and the tower reflux flow regulating valve is controlled by the tower reflux flow controller 11. The first tower reflux flow delivery outlet valve and the second tower reflux flow delivery outlet valve are respectively provided before and after the tower reflux flow regulating valve, and a reflux flow delivery bypass valve is connected in parallel at both ends of the first tower reflux flow delivery outlet valve and the second tower reflux flow delivery outlet valve.

[0030] When the ethanolamine preparation device is working, the tower reflux pump outlet flow controller 5, the tower reflux pump outlet pressure controller 9, the product delivery flow controller 16 and the tower reflux flow controller are used to adjust the opening of the valve device of each pipeline respectively, so as to control the flow and pressure of the materials in the first branch pipeline, the second branch pipeline and the third branch pipeline.

[0031] Specifically, in this embodiment, if Figure 1 As shown, according to the working condition requirements, the MEA material is preferentially supplied to the circulation pipeline through the tower reflux pump 6 through the first branch pipeline to meet the required flow rate. The other part of the material is transported to the product intermediate tank after the flow rate is adjusted by controlling the opening of the product flow regulating valve according to the product reflux tank liquid level controller 4. The pressure delivered by the tower reflux pump 6 to the inlet of the circulation pump is regulated by the reflux pump outlet pressure controller 9 to control the reflux pump outlet pressure regulating valve 8. According to the inlet pressure requirement of the circulation pump on the circulation pipeline, the opening of the reflux pump outlet pressure regulating valve 8 is controlled. In order to avoid the situation where the P-303A / B circulation pump inlet is overpressured due to abnormal working conditions and affects the normal operation of the machine pump, a safety valve is installed after the pressure regulating valve. The safety valve tripping pressure is the maximum pressure that can be reached at the pump inlet when the P-303A / B circulation pump is operating normally.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A pipeline structure of an ethanolamine preparation device, characterized in that: include: A main pipeline, wherein a refining tower, a tower top cooler and a reflux tank are sequentially arranged on the main pipeline, a material outlet of the refining tower is connected to a material inlet of the tower top cooler through a part of the main pipeline, a material outlet of the tower top cooler is connected to a material inlet of the reflux tank through a part of the main pipeline, a reflux pump is arranged on a part of the main pipeline connected to a material outlet pipeline of the reflux tank, and an end of the main pipeline is connected to a material reflux port of the reflux tank; A first branch pipeline, wherein the first branch pipeline is connected to the circulation pipeline through a circulation pump; a second branch pipeline, wherein the second branch pipeline is connected to the intermediate tank; A third branch pipeline, wherein the third branch pipeline is connected to a material reflux port of a refining tower; The first branch pipeline, the second branch pipeline and the third branch pipeline are connected in parallel to the main pipeline.

2. The pipeline structure of an ethanolamine preparation device according to claim 1, characterized in that: The first branch pipeline is also used to connect to a reflux pipeline, and a material outlet of the reflux pipeline is connected to the main pipeline.

3. The pipeline structure of an ethanolamine preparation device according to claim 1, characterized in that: The first branch pipeline is provided with a circulation flow regulating valve.

4. The pipeline structure of an ethanolamine preparation device according to claim 1, characterized in that: The second branch pipeline is provided with a product flow delivery outlet valve.

5. The pipeline structure of an ethanolamine preparation device according to claim 4, characterized in that: The second branch pipeline is also provided with a product flow regulating bypass valve, and the product flow regulating bypass valve is arranged in parallel with the product flow delivery outlet valve.

6. The pipeline structure of an ethanolamine preparation device according to claim 4, characterized in that: The reflux tank is also connected to a second branch pipeline through an adjusting pipeline, and a reflux tank level controller, a product delivery flow transmitter and a product delivery flow transmitter are sequentially arranged on the adjusting pipeline.

7. The pipeline structure of an ethanolamine preparation device according to claim 4, characterized in that: The third branch pipeline is provided with a reflux flow controller.

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